diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 901b638..1e418ec 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -160,6 +160,13 @@
             </intent-filter>
         </receiver>
 
+        <receiver
+            android:name="com.android.launcher3.WallpaperChangedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.WALLPAPER_CHANGED" />
+            </intent-filter>
+        </receiver>
+
         <!-- Intent received used to install shortcuts from other applications -->
         <receiver
             android:name="com.android.launcher3.InstallShortcutReceiver"
diff --git a/res/values-land/styles.xml b/res/values-land/styles.xml
index ccb5fcb..d18a57b 100644
--- a/res/values-land/styles.xml
+++ b/res/values-land/styles.xml
@@ -27,7 +27,7 @@
     </style>
     <style name="DropTargetButtonContainer">
         <item name="android:layout_width">match_parent</item>
-        <item name="android:layout_height">0dp</item>
+        <item name="android:layout_height">wrap_content</item>
     </style>
     <style name="DropTargetButton">
         <item name="android:layout_width">wrap_content</item>
diff --git a/src/com/android/launcher3/AppsCustomizePagedView.java b/src/com/android/launcher3/AppsCustomizePagedView.java
index 688ff82..2865bc5 100644
--- a/src/com/android/launcher3/AppsCustomizePagedView.java
+++ b/src/com/android/launcher3/AppsCustomizePagedView.java
@@ -916,6 +916,16 @@
     }
 
     @Override
+    public boolean supportsAppInfoDropTarget() {
+        return true;
+    }
+
+    @Override
+    public boolean supportsDeleteDropTarget() {
+        return false;
+    }
+
+    @Override
     public float getIntrinsicIconScaleFactor() {
         LauncherAppState app = LauncherAppState.getInstance();
         DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 4023daf..a8ac074 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -29,6 +29,7 @@
 import android.graphics.PointF;
 import android.graphics.Rect;
 import android.graphics.drawable.TransitionDrawable;
+import android.os.AsyncTask;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewConfiguration;
@@ -95,7 +96,7 @@
     }
 
     private boolean isAllAppsApplication(DragSource source, Object info) {
-        return (source instanceof AppsCustomizePagedView) && (info instanceof AppInfo);
+        return source.supportsAppInfoDropTarget() && (info instanceof AppInfo);
     }
     private boolean isAllAppsWidget(DragSource source, Object info) {
         if (source instanceof AppsCustomizePagedView) {
@@ -175,6 +176,7 @@
         boolean isVisible = true;
         boolean useUninstallLabel = !AppsCustomizePagedView.DISABLE_ALL_APPS &&
                 isAllAppsApplication(source, info);
+        boolean useDeleteLabel = !useUninstallLabel && source.supportsDeleteDropTarget();
 
         // If we are dragging an application from AppsCustomize, only show the control if we can
         // delete the app (it was downloaded), and rename the string to "uninstall" in such a case.
@@ -185,15 +187,17 @@
 
         if (useUninstallLabel) {
             setCompoundDrawablesRelativeWithIntrinsicBounds(mUninstallDrawable, null, null, null);
-        } else {
+        } else if (useDeleteLabel) {
             setCompoundDrawablesRelativeWithIntrinsicBounds(mRemoveDrawable, null, null, null);
+        } else {
+            isVisible = false;
         }
         mCurrentDrawable = (TransitionDrawable) getCurrentDrawable();
 
         mActive = isVisible;
         resetHoverColor();
         ((ViewGroup) getParent()).setVisibility(isVisible ? View.VISIBLE : View.GONE);
-        if (getText().length() > 0) {
+        if (isVisible && getText().length() > 0) {
             setText(useUninstallLabel ? R.string.delete_target_uninstall_label
                 : R.string.delete_target_label);
         }
@@ -334,11 +338,12 @@
             if (appWidgetHost != null) {
                 // Deleting an app widget ID is a void call but writes to disk before returning
                 // to the caller...
-                new Thread("deleteAppWidgetId") {
-                    public void run() {
+                new AsyncTask<Void, Void, Void>() {
+                    public Void doInBackground(Void ... args) {
                         appWidgetHost.deleteAppWidgetId(launcherAppWidgetInfo.appWidgetId);
+                        return null;
                     }
-                }.start();
+                }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
             }
         }
         if (wasWaitingForUninstall && !mWaitingForUninstall) {
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 626ec42..511b718 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -73,6 +73,7 @@
     boolean isLandscape;
     boolean isTablet;
     boolean isLargeTablet;
+    boolean isLayoutRtl;
     boolean transposeLayoutWithOrientation;
 
     int desiredWorkspaceLeftRightMarginPx;
@@ -310,7 +311,7 @@
         searchBarSpaceMaxWidthPx = resources.getDimensionPixelSize(R.dimen.dynamic_grid_search_bar_max_width);
         searchBarHeightPx = resources.getDimensionPixelSize(R.dimen.dynamic_grid_search_bar_height);
         searchBarSpaceWidthPx = Math.min(searchBarSpaceMaxWidthPx, widthPx);
-        searchBarSpaceHeightPx = searchBarHeightPx + 2 * edgeMarginPx;
+        searchBarSpaceHeightPx = searchBarHeightPx + getSearchBarTopOffset();
 
         // Calculate the actual text height
         Paint textPaint = new Paint();
@@ -356,10 +357,11 @@
 
     void updateFromConfiguration(Context context, Resources resources, int wPx, int hPx,
                                  int awPx, int ahPx) {
-        isLandscape = (resources.getConfiguration().orientation ==
-                Configuration.ORIENTATION_LANDSCAPE);
+        Configuration configuration = resources.getConfiguration();
+        isLandscape = (configuration.orientation == Configuration.ORIENTATION_LANDSCAPE);
         isTablet = resources.getBoolean(R.bool.is_tablet);
         isLargeTablet = resources.getBoolean(R.bool.is_large_tablet);
+        isLayoutRtl = (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
         widthPx = wPx;
         heightPx = hPx;
         availableWidthPx = awPx;
@@ -419,6 +421,15 @@
         return sum;
     }
 
+    /** Returns the search bar top offset */
+    int getSearchBarTopOffset() {
+        if (isTablet() && !isVerticalBarLayout()) {
+            return 4 * edgeMarginPx;
+        } else {
+            return 2 * edgeMarginPx;
+        }
+    }
+
     /** Returns the search bar bounds in the current orientation */
     Rect getSearchBarBounds() {
         return getSearchBarBounds(isLandscape ? CellLayout.LANDSCAPE : CellLayout.PORTRAIT);
@@ -428,7 +439,13 @@
         Rect bounds = new Rect();
         if (orientation == CellLayout.LANDSCAPE &&
                 transposeLayoutWithOrientation) {
-            bounds.set(0, edgeMarginPx, searchBarSpaceHeightPx, availableHeightPx - edgeMarginPx);
+            if (isLayoutRtl) {
+                bounds.set(availableWidthPx - searchBarSpaceHeightPx, edgeMarginPx,
+                        availableWidthPx, availableHeightPx - edgeMarginPx);
+            } else {
+                bounds.set(0, edgeMarginPx, searchBarSpaceHeightPx,
+                        availableHeightPx - edgeMarginPx);
+            }
         } else {
             if (isTablet()) {
                 // Pad the left and right of the workspace to ensure consistent spacing
@@ -440,10 +457,12 @@
                 //      that into account here too.
                 int gap = (int) ((width - 2 * edgeMarginPx -
                         (numColumns * cellWidthPx)) / (2 * (numColumns + 1)));
-                bounds.set(edgeMarginPx + gap, 0, availableWidthPx - (edgeMarginPx + gap),
+                bounds.set(edgeMarginPx + gap, getSearchBarTopOffset(),
+                        availableWidthPx - (edgeMarginPx + gap),
                         searchBarSpaceHeightPx);
             } else {
-                bounds.set(desiredWorkspaceLeftRightMarginPx - defaultWidgetPadding.left, 0,
+                bounds.set(desiredWorkspaceLeftRightMarginPx - defaultWidgetPadding.left,
+                        getSearchBarTopOffset(),
                         availableWidthPx - (desiredWorkspaceLeftRightMarginPx -
                         defaultWidgetPadding.right), searchBarSpaceHeightPx);
             }
@@ -461,8 +480,13 @@
         if (orientation == CellLayout.LANDSCAPE &&
                 transposeLayoutWithOrientation) {
             // Pad the left and right of the workspace with search/hotseat bar sizes
-            padding.set(searchBarBounds.right, edgeMarginPx,
-                    hotseatBarHeightPx, edgeMarginPx);
+            if (isLayoutRtl) {
+                padding.set(hotseatBarHeightPx, edgeMarginPx,
+                        searchBarBounds.width(), edgeMarginPx);
+            } else {
+                padding.set(searchBarBounds.width(), edgeMarginPx,
+                        hotseatBarHeightPx, edgeMarginPx);
+            }
         } else {
             if (isTablet()) {
                 // Pad the left and right of the workspace to ensure consistent spacing
@@ -561,7 +585,7 @@
         View searchBar = launcher.getSearchBar();
         lp = (FrameLayout.LayoutParams) searchBar.getLayoutParams();
         if (hasVerticalBarLayout) {
-            // Vertical search bar
+            // Vertical search bar space
             lp.gravity = Gravity.TOP | Gravity.LEFT;
             lp.width = searchBarSpaceHeightPx;
             lp.height = LayoutParams.MATCH_PARENT;
@@ -569,13 +593,13 @@
                     0, 2 * edgeMarginPx, 0,
                     2 * edgeMarginPx);
         } else {
-            // Horizontal search bar
+            // Horizontal search bar space
             lp.gravity = Gravity.TOP | Gravity.CENTER_HORIZONTAL;
             lp.width = searchBarSpaceWidthPx;
             lp.height = searchBarSpaceHeightPx;
             searchBar.setPadding(
                     2 * edgeMarginPx,
-                    2 * edgeMarginPx,
+                    getSearchBarTopOffset(),
                     2 * edgeMarginPx, 0);
         }
         searchBar.setLayoutParams(lp);
@@ -616,7 +640,7 @@
         lp = (FrameLayout.LayoutParams) hotseat.getLayoutParams();
         if (hasVerticalBarLayout) {
             // Vertical hotseat
-            lp.gravity = Gravity.RIGHT;
+            lp.gravity = Gravity.END;
             lp.width = hotseatBarHeightPx;
             lp.height = LayoutParams.MATCH_PARENT;
             hotseat.findViewById(R.id.layout).setPadding(0, 2 * edgeMarginPx, 0, 2 * edgeMarginPx);
@@ -692,7 +716,8 @@
                 paddingTB = Math.min(paddingTB, (int)((paddingLR + paddingTB) * 0.75f));
                 int maxAllAppsWidth = (allAppsNumCols * (allAppsCellWidthPx + 2 * paddingLR));
                 int gridPaddingLR = (availableWidthPx - maxAllAppsWidth) / 2;
-                if (gridPaddingLR > (allAppsCellWidthPx / 4)) {
+                // Only adjust the side paddings on landscape phones, or tablets
+                if ((isTablet() || isLandscape) && gridPaddingLR > (allAppsCellWidthPx / 4)) {
                     padding.left = padding.right = gridPaddingLR;
                 }
                 // The icons are centered, so we can't just offset by the page indicator height
diff --git a/src/com/android/launcher3/DragSource.java b/src/com/android/launcher3/DragSource.java
index cca9ab1..7369eea 100644
--- a/src/com/android/launcher3/DragSource.java
+++ b/src/com/android/launcher3/DragSource.java
@@ -30,6 +30,17 @@
      */
     boolean supportsFlingToDelete();
 
+    /**
+     * @return whether items dragged from this source supports 'App Info'
+     */
+    boolean supportsAppInfoDropTarget();
+
+    /**
+     * @return whether items dragged from this source supports 'Delete' drop target (e.g. to remove
+     * a shortcut.
+     */
+    boolean supportsDeleteDropTarget();
+
     /*
      * @return the scale of the icons over the workspace icon size
      */
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index 1d234ff..bbe6af2 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -82,7 +82,7 @@
     private int mState = STATE_NONE;
     private static final int REORDER_ANIMATION_DURATION = 230;
     private static final int REORDER_DELAY = 250;
-    private static final int ON_EXIT_CLOSE_DELAY = 800;
+    private static final int ON_EXIT_CLOSE_DELAY = 400;
     private boolean mRearrangeOnClose = false;
     private FolderIcon mFolderIcon;
     private int mMaxCountX;
@@ -801,6 +801,16 @@
         return true;
     }
 
+    @Override
+    public boolean supportsAppInfoDropTarget() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsDeleteDropTarget() {
+        return true;
+    }
+
     public void onFlingToDelete(DragObject d, int x, int y, PointF vec) {
         // Do nothing
     }
diff --git a/src/com/android/launcher3/InfoDropTarget.java b/src/com/android/launcher3/InfoDropTarget.java
index 2ad43b6..374238c 100644
--- a/src/com/android/launcher3/InfoDropTarget.java
+++ b/src/com/android/launcher3/InfoDropTarget.java
@@ -62,10 +62,6 @@
         }
     }
 
-    private boolean isFromAllApps(DragSource source) {
-        return (source instanceof AppsCustomizePagedView);
-    }
-
     @Override
     public boolean acceptDrop(DragObject d) {
         // acceptDrop is called just before onDrop. We do the work here, rather than
@@ -93,7 +89,7 @@
         boolean isVisible = true;
 
         // Hide this button unless we are dragging something from AllApps
-        if (!isFromAllApps(source)) {
+        if (!source.supportsAppInfoDropTarget()) {
             isVisible = false;
         }
 
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index ba3ba93..e2301ba 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -585,12 +585,12 @@
             mIconCache.flush();
 
             final LocaleConfiguration localeConfiguration = sLocaleConfiguration;
-            new Thread("WriteLocaleConfiguration") {
-                @Override
-                public void run() {
+            new AsyncTask<Void, Void, Void>() {
+                public Void doInBackground(Void ... args) {
                     writeConfiguration(Launcher.this, localeConfiguration);
+                    return null;
                 }
-            }.start();
+            }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
         }
     }
 
@@ -1490,11 +1490,12 @@
             if (appWidgetId != -1) {
                 // Deleting an app widget ID is a void call but writes to disk before returning
                 // to the caller...
-                new Thread("deleteAppWidgetId") {
-                    public void run() {
+                new AsyncTask<Void, Void, Void>() {
+                    public Void doInBackground(Void ... args) {
                         mAppWidgetHost.deleteAppWidgetId(appWidgetId);
+                        return null;
                     }
-                }.start();
+                }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
             }
             showOutOfSpaceMessage(isHotseatLayout(layout));
             return;
@@ -1764,7 +1765,7 @@
             }
 
             // Reset the apps customize page
-            if (mAppsCustomizeTabHost != null) {
+            if (!alreadyOnHome && mAppsCustomizeTabHost != null) {
                 mAppsCustomizeTabHost.reset();
             }
 
@@ -1878,7 +1879,7 @@
 
         mDragLayer.clearAllResizeFrames();
         ((ViewGroup) mWorkspace.getParent()).removeAllViews();
-        mWorkspace.removeAllViews();
+        mWorkspace.removeAllWorkspaceScreens();
         mWorkspace = null;
         mDragController = null;
 
@@ -2374,7 +2375,7 @@
      * @param v The view that was clicked.
      */
     public void onClickAllAppsButton(View v) {
-        showAllApps(true, AppsCustomizePagedView.ContentType.Applications, true);
+        showAllApps(true, AppsCustomizePagedView.ContentType.Applications, false);
     }
 
     public void onTouchDownAllAppsButton(View v) {
@@ -2664,7 +2665,7 @@
     }
 
     public void closeFolder() {
-        Folder folder = mWorkspace.getOpenFolder();
+        Folder folder = mWorkspace != null ? mWorkspace.getOpenFolder() : null;
         if (folder != null) {
             if (folder.isEditingName()) {
                 folder.dismissEditingName();
@@ -4024,6 +4025,11 @@
                 getDeviceProfile().isVerticalBarLayout();
     }
 
+    protected Rect getSearchBarBounds() {
+        return LauncherAppState.getInstance().getDynamicGrid().
+                getDeviceProfile().getSearchBarBounds();
+    }
+
     @Override
     public void bindSearchablesChanged() {
         boolean searchVisible = updateGlobalSearchIcon();
@@ -4267,13 +4273,14 @@
                 public void run() {
                     cling.cleanup();
                     // We should update the shared preferences on a background thread
-                    new Thread("dismissClingThread") {
-                        public void run() {
+                    new AsyncTask<Void, Void, Void>() {
+                        public Void doInBackground(Void ... args) {
                             SharedPreferences.Editor editor = mSharedPrefs.edit();
                             editor.putBoolean(flag, true);
                             editor.commit();
+                            return null;
                         }
-                    }.start();
+                    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
                     if (postAnimationCb != null) {
                         postAnimationCb.run();
                     }
@@ -4582,9 +4589,8 @@
 
     public void dumpLogsToLocalData() {
         if (DEBUG_DUMP_LOG) {
-            new Thread("DumpLogsToLocalData") {
-                @Override
-                public void run() {
+            new AsyncTask<Void, Void, Void>() {
+                public Void doInBackground(Void ... args) {
                     boolean success = false;
                     sDateStamp.setTime(sRunStart);
                     String FILENAME = sDateStamp.getMonth() + "-"
@@ -4622,8 +4628,9 @@
                     } catch (IOException e) {
                         e.printStackTrace();
                     }
+                    return null;
                 }
-            }.start();
+            }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
         }
     }
 }
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 9a47eaa..5daa845 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -39,6 +39,7 @@
     private boolean mIsScreenLarge;
     private float mScreenDensity;
     private int mLongPressTimeout = 300;
+    private boolean mWallpaperChangedSinceLastCheck;
 
     private static WeakReference<LauncherProvider> sLauncherProvider;
     private static Context sContext;
@@ -217,6 +218,16 @@
         return mLongPressTimeout;
     }
 
+    public void onWallpaperChanged() {
+        mWallpaperChangedSinceLastCheck = true;
+    }
+
+    public boolean hasWallpaperChangedSinceLastCheck() {
+        boolean result = mWallpaperChangedSinceLastCheck;
+        mWallpaperChangedSinceLastCheck = false;
+        return result;
+    }
+
     @Override
     public void onAvailableSizeChanged(DeviceProfile grid) {
         Utilities.setIconSize(grid.iconSizePx);
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 6a6cb35..74f28b3 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -2041,12 +2041,6 @@
                 }
             }
 
-            // If we aren't filtering on a screen, then the set of items to load is the full set of
-            // items given.
-            if (currentScreenId < 0) {
-                throw new RuntimeException("Unexpected screen id");
-            }
-
             // Order the set of items by their containers first, this allows use to walk through the
             // list sequentially, build up a list of containers that are in the specified screen,
             // as well as all items in those containers.
@@ -2084,11 +2078,6 @@
                 ArrayList<LauncherAppWidgetInfo> appWidgets,
                 ArrayList<LauncherAppWidgetInfo> currentScreenWidgets,
                 ArrayList<LauncherAppWidgetInfo> otherScreenWidgets) {
-            // If we aren't filtering on a screen, then the set of items to load is the full set of
-            // widgets given.
-            if (currentScreenId < 0) {
-                throw new RuntimeException("Unexpected screen id");
-            }
 
             for (LauncherAppWidgetInfo widget : appWidgets) {
                 if (widget == null) continue;
@@ -2107,11 +2096,6 @@
                 HashMap<Long, FolderInfo> folders,
                 HashMap<Long, FolderInfo> currentScreenFolders,
                 HashMap<Long, FolderInfo> otherScreenFolders) {
-            // If we aren't filtering on a screen, then the set of items to load is the full set of
-            // widgets given.
-            if (currentScreenId < 0) {
-                throw new RuntimeException("Unexpected screen id");
-            }
 
             for (long id : folders.keySet()) {
                 ItemInfo info = itemsIdMap.get(id);
@@ -2261,13 +2245,15 @@
             }
 
             final boolean isLoadingSynchronously = (synchronizeBindPage > -1);
-            final int currentScreen = isLoadingSynchronously ? synchronizeBindPage :
+            int currScreen = isLoadingSynchronously ? synchronizeBindPage :
                 oldCallbacks.getCurrentWorkspaceScreen();
-            if (currentScreen >= orderedScreenIds.size()) {
-                Log.w(TAG, "Invalid screen id to synchronously load");
-                return;
+            if (currScreen >= orderedScreenIds.size()) {
+                // There may be no workspace screens (just hotseat items and an empty page).
+                currScreen = -1;
             }
-            final long currentScreenId = orderedScreenIds.get(currentScreen);
+            final int currentScreen = currScreen;
+            final long currentScreenId =
+                    currentScreen < 0 ? -1 : orderedScreenIds.get(currentScreen);
 
             // Load all the items that are on the current page first (and in the process, unbind
             // all the existing workspace items before we call startBinding() below.
@@ -2312,7 +2298,7 @@
                 r = new Runnable() {
                     public void run() {
                         Callbacks callbacks = tryGetCallbacks(oldCallbacks);
-                        if (callbacks != null) {
+                        if (callbacks != null && currentScreen >= 0) {
                             callbacks.onPageBoundSynchronously(currentScreen);
                         }
                     }
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index dbc1b1c..27b7dae 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -290,6 +290,13 @@
         public void onRow(ContentValues values);
     }
 
+    private static boolean shouldImportLauncher2Database(Context context) {
+        boolean isTablet = context.getResources().getBoolean(R.bool.is_tablet);
+
+        // We don't import the old databse for tablets, as the grid size has changed.
+        return !isTablet && IMPORT_LAUNCHER2_DATABASE;
+    }
+
     private static class DatabaseHelper extends SQLiteOpenHelper {
         private static final String TAG_FAVORITES = "favorites";
         private static final String TAG_FAVORITE = "favorite";
@@ -369,7 +376,7 @@
                 sendAppWidgetResetNotify();
             }
 
-            if (IMPORT_LAUNCHER2_DATABASE) {
+            if (shouldImportLauncher2Database(mContext)) {
                 // Try converting the old database
                 ContentValuesCallback permuteScreensCb = new ContentValuesCallback() {
                     public void onRow(ContentValues values) {
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index bb79c2c..c216f92 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -153,7 +153,6 @@
 
     protected int mTouchState = TOUCH_STATE_REST;
     protected boolean mForceScreenScrolled = false;
-    private boolean mScrollAbortedFromIntercept = false;
 
 
     protected OnLongClickListener mLongClickListener;
@@ -1395,13 +1394,13 @@
                  * being flinged.
                  */
                 final int xDist = Math.abs(mScroller.getFinalX() - mScroller.getCurrX());
-                final boolean finishedScrolling = (mScroller.isFinished() || xDist < mTouchSlop);
+                final boolean finishedScrolling = (mScroller.isFinished() || xDist < mTouchSlop / 3);
 
                 if (finishedScrolling) {
                     mTouchState = TOUCH_STATE_REST;
-                    if (!mScroller.isFinished()) {
-                        mScrollAbortedFromIntercept = true;
-                        abortScrollerAnimation(false);
+                    if (!mScroller.isFinished() && !mFreeScroll) {
+                        setCurrentPage(getNextPage());
+                        pageEndMoving();
                     }
                 } else {
                     if (isTouchPointInViewportWithBuffer((int) mDownMotionX, (int) mDownMotionY)) {
@@ -1429,9 +1428,6 @@
 
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
-                if (mScrollAbortedFromIntercept) {
-                    snapToDestination();
-                }
                 resetTouchState();
                 break;
 
@@ -2000,7 +1996,6 @@
         releaseVelocityTracker();
         endReordering();
         mCancelTap = false;
-        mScrollAbortedFromIntercept = false;
         mTouchState = TOUCH_STATE_REST;
         mActivePointerId = INVALID_POINTER;
     }
diff --git a/src/com/android/launcher3/PreloadReceiver.java b/src/com/android/launcher3/PreloadReceiver.java
index 75e5c98..ca25746 100644
--- a/src/com/android/launcher3/PreloadReceiver.java
+++ b/src/com/android/launcher3/PreloadReceiver.java
@@ -19,6 +19,7 @@
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
+import android.os.AsyncTask;
 import android.text.TextUtils;
 import android.util.Log;
 
@@ -39,12 +40,12 @@
             if (LOGD) {
                 Log.d(TAG, "workspace name: " + name + " id: " + workspaceResId);
             }
-            new Thread(new Runnable() {
-                @Override
-                public void run() {
+            new AsyncTask<Void, Void, Void>() {
+                public Void doInBackground(Void ... args) {
                     provider.loadDefaultFavoritesIfNecessary(workspaceResId);
+                    return null;
                 }
-            }).start();
+            }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
         }
     }
 }
diff --git a/src/com/android/launcher3/WallpaperChangedReceiver.java b/src/com/android/launcher3/WallpaperChangedReceiver.java
new file mode 100644
index 0000000..28e41d8
--- /dev/null
+++ b/src/com/android/launcher3/WallpaperChangedReceiver.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class WallpaperChangedReceiver extends BroadcastReceiver {
+    public void onReceive(Context context, Intent data) {
+        LauncherAppState appState = LauncherAppState.getInstance();
+        appState.onWallpaperChanged();
+    }
+}
diff --git a/src/com/android/launcher3/WallpaperCropActivity.java b/src/com/android/launcher3/WallpaperCropActivity.java
index 65223ad..b3ef073 100644
--- a/src/com/android/launcher3/WallpaperCropActivity.java
+++ b/src/com/android/launcher3/WallpaperCropActivity.java
@@ -71,6 +71,8 @@
     public static final int MAX_BMAP_IN_INTENT = 750000;
     private static final float WALLPAPER_SCREENS_SPAN = 2f;
 
+    protected static Point sDefaultWallpaperSize;
+
     protected CropView mCropView;
     protected Uri mUri;
 
@@ -204,32 +206,34 @@
     }
 
     static protected Point getDefaultWallpaperSize(Resources res, WindowManager windowManager) {
-        Point minDims = new Point();
-        Point maxDims = new Point();
-        windowManager.getDefaultDisplay().getCurrentSizeRange(minDims, maxDims);
+        if (sDefaultWallpaperSize == null) {
+            Point minDims = new Point();
+            Point maxDims = new Point();
+            windowManager.getDefaultDisplay().getCurrentSizeRange(minDims, maxDims);
 
-        int maxDim = Math.max(maxDims.x, maxDims.y);
-        int minDim = Math.max(minDims.x, minDims.y);
+            int maxDim = Math.max(maxDims.x, maxDims.y);
+            int minDim = Math.max(minDims.x, minDims.y);
 
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
-            Point realSize = new Point();
-            windowManager.getDefaultDisplay().getRealSize(realSize);
-            maxDim = Math.max(realSize.x, realSize.y);
-            minDim = Math.min(realSize.x, realSize.y);
+            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
+                Point realSize = new Point();
+                windowManager.getDefaultDisplay().getRealSize(realSize);
+                maxDim = Math.max(realSize.x, realSize.y);
+                minDim = Math.min(realSize.x, realSize.y);
+            }
+
+            // We need to ensure that there is enough extra space in the wallpaper
+            // for the intended parallax effects
+            final int defaultWidth, defaultHeight;
+            if (isScreenLarge(res)) {
+                defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));
+                defaultHeight = maxDim;
+            } else {
+                defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);
+                defaultHeight = maxDim;
+            }
+            sDefaultWallpaperSize = new Point(defaultWidth, defaultHeight);
         }
-
-        // We need to ensure that there is enough extra space in the wallpaper
-        // for the intended
-        // parallax effects
-        final int defaultWidth, defaultHeight;
-        if (isScreenLarge(res)) {
-            defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));
-            defaultHeight = maxDim;
-        } else {
-            defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);
-            defaultHeight = maxDim;
-        }
-        return new Point(defaultWidth, defaultHeight);
+        return sDefaultWallpaperSize;
     }
 
     public static int getRotationFromExif(String path) {
@@ -785,15 +789,13 @@
             WindowManager windowManager,
             final WallpaperManager wallpaperManager) {
         final Point defaultWallpaperSize = getDefaultWallpaperSize(res, windowManager);
-
-        new Thread("suggestWallpaperDimension") {
-            public void run() {
-                // If we have saved a wallpaper width/height, use that instead
-                int savedWidth = sharedPrefs.getInt(WALLPAPER_WIDTH_KEY, defaultWallpaperSize.x);
-                int savedHeight = sharedPrefs.getInt(WALLPAPER_HEIGHT_KEY, defaultWallpaperSize.y);
-                wallpaperManager.suggestDesiredDimensions(savedWidth, savedHeight);
-            }
-        }.start();
+        // If we have saved a wallpaper width/height, use that instead
+        int savedWidth = sharedPrefs.getInt(WALLPAPER_WIDTH_KEY, defaultWallpaperSize.x);
+        int savedHeight = sharedPrefs.getInt(WALLPAPER_HEIGHT_KEY, defaultWallpaperSize.y);
+        if (savedWidth != wallpaperManager.getDesiredMinimumWidth() ||
+                savedHeight != wallpaperManager.getDesiredMinimumHeight()) {
+            wallpaperManager.suggestDesiredDimensions(savedWidth, savedHeight);
+        }
     }
 
     protected static RectF getMaxCropRect(
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index f8db240..bf4f561 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -31,7 +31,6 @@
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -44,6 +43,7 @@
 import android.graphics.Region.Op;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
+import android.os.AsyncTask;
 import android.os.IBinder;
 import android.os.Parcelable;
 import android.support.v4.view.ViewCompat;
@@ -55,10 +55,7 @@
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.View.OnClickListener;
-import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
-import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
 import android.widget.TextView;
@@ -338,6 +335,14 @@
     @Override
     public void setInsets(Rect insets) {
         mInsets.set(insets);
+
+        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
+        if (customScreen != null) {
+            View customContent = customScreen.getShortcutsAndWidgets().getChildAt(0);
+            if (customContent instanceof Insettable) {
+                ((Insettable) customContent).setInsets(mInsets);
+            }
+        }
     }
 
     // estimate the size of a widget with spans hSpan, vSpan. return MAX_VALUE for each
@@ -433,6 +438,9 @@
 
         mMaxDistanceForFolderCreation = (0.55f * grid.iconSizePx);
         mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity);
+
+        // Set the wallpaper dimensions when Launcher starts up
+        setWallpaperDimension();
     }
 
     private void setupLayoutTransition() {
@@ -623,6 +631,12 @@
         if (customContent instanceof Insettable) {
             ((Insettable)customContent).setInsets(mInsets);
         }
+
+        // Verify that the child is removed from any existing parent.
+        if (customContent.getParent() instanceof ViewGroup) {
+            ViewGroup parent = (ViewGroup) customContent.getParent();
+            parent.removeView(customContent);
+        }
         customScreen.removeAllViews();
         customScreen.addViewToCellLayout(customContent, 0, 0, lp, true);
         mCustomContentDescription = description;
@@ -1222,10 +1236,16 @@
     }
 
     protected void setWallpaperDimension() {
-        String spKey = WallpaperCropActivity.getSharedPreferencesKey();
-        SharedPreferences sp = mLauncher.getSharedPreferences(spKey, Context.MODE_MULTI_PROCESS);
-        WallpaperPickerActivity.suggestWallpaperDimension(mLauncher.getResources(),
-                sp, mLauncher.getWindowManager(), mWallpaperManager);
+        new AsyncTask<Void, Void, Void>() {
+            public Void doInBackground(Void ... args) {
+                String spKey = WallpaperCropActivity.getSharedPreferencesKey();
+                SharedPreferences sp =
+                        mLauncher.getSharedPreferences(spKey, Context.MODE_MULTI_PROCESS);
+                WallpaperPickerActivity.suggestWallpaperDimension(mLauncher.getResources(),
+                        sp, mLauncher.getWindowManager(), mWallpaperManager);
+                return null;
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
     }
 
     protected void snapToPage(int whichPage, Runnable r) {
@@ -1683,6 +1703,12 @@
         AccessibilityManager am = (AccessibilityManager)
                 getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
         sAccessibilityEnabled = am.isEnabled();
+
+        // Update wallpaper dimensions if they were changed since last onResume
+        // (we also always set the wallpaper dimensions in the constructor)
+        if (LauncherAppState.getInstance().hasWallpaperChangedSinceLastCheck()) {
+            setWallpaperDimension();
+        }
     }
 
     @Override
@@ -2114,7 +2140,6 @@
             enableFreeScroll();
         }
 
-
         if (state != State.NORMAL) {
             if (stateIsSpringLoaded) {
                 mNewScale = mSpringLoadedShrinkFactor;
@@ -2182,6 +2207,7 @@
         final View searchBar = mLauncher.getQsbBar();
         final View overviewPanel = mLauncher.getOverviewPanel();
         final View hotseat = mLauncher.getHotseat();
+        final View pageIndicator = getPageIndicator();
         if (animated) {
             anim.setDuration(duration);
             LauncherViewPropertyAnimator scale = new LauncherViewPropertyAnimator(this);
@@ -2221,31 +2247,38 @@
                     }
                 }
             }
-            ObjectAnimator pageIndicatorAlpha = null;
-            if (getPageIndicator() != null) {
-                pageIndicatorAlpha = ObjectAnimator.ofFloat(getPageIndicator(), "alpha",
-                        finalHotseatAndPageIndicatorAlpha);
+            Animator pageIndicatorAlpha = null;
+            if (pageIndicator != null) {
+                pageIndicatorAlpha = new LauncherViewPropertyAnimator(pageIndicator)
+                    .alpha(finalHotseatAndPageIndicatorAlpha).withLayer();
+                pageIndicatorAlpha.addListener(new AlphaUpdateListener(pageIndicator));
+            } else {
+                // create a dummy animation so we don't need to do null checks later
+                pageIndicatorAlpha = ValueAnimator.ofFloat(0, 0);
             }
-            ObjectAnimator hotseatAlpha = ObjectAnimator.ofFloat(hotseat, "alpha",
-                    finalHotseatAndPageIndicatorAlpha);
-            ObjectAnimator searchBarAlpha = ObjectAnimator.ofFloat(searchBar,
-                    "alpha", finalSearchBarAlpha);
-            ObjectAnimator overviewPanelAlpha = ObjectAnimator.ofFloat(overviewPanel,
-                    "alpha", finalOverviewPanelAlpha);
 
-            overviewPanelAlpha.addListener(new AlphaUpdateListener(overviewPanel));
+            Animator hotseatAlpha = new LauncherViewPropertyAnimator(hotseat)
+                .alpha(finalHotseatAndPageIndicatorAlpha).withLayer();
             hotseatAlpha.addListener(new AlphaUpdateListener(hotseat));
+
+            Animator searchBarAlpha = new LauncherViewPropertyAnimator(searchBar)
+                .alpha(finalSearchBarAlpha).withLayer();
             searchBarAlpha.addListener(new AlphaUpdateListener(searchBar));
 
+            Animator overviewPanelAlpha = new LauncherViewPropertyAnimator(overviewPanel)
+                .alpha(finalOverviewPanelAlpha).withLayer();
+            overviewPanelAlpha.addListener(new AlphaUpdateListener(overviewPanel));
+
             if (workspaceToOverview) {
+                pageIndicatorAlpha.setInterpolator(new DecelerateInterpolator(2));
                 hotseatAlpha.setInterpolator(new DecelerateInterpolator(2));
+                overviewPanelAlpha.setInterpolator(null);
             } else if (overviewToWorkspace) {
+                pageIndicatorAlpha.setInterpolator(null);
+                hotseatAlpha.setInterpolator(null);
                 overviewPanelAlpha.setInterpolator(new DecelerateInterpolator(2));
             }
-
-            if (getPageIndicator() != null) {
-                pageIndicatorAlpha.addListener(new AlphaUpdateListener(getPageIndicator()));
-            }
+            searchBarAlpha.setInterpolator(null);
 
             anim.play(overviewPanelAlpha);
             anim.play(hotseatAlpha);
@@ -2257,9 +2290,9 @@
             AlphaUpdateListener.updateVisibility(overviewPanel);
             hotseat.setAlpha(finalHotseatAndPageIndicatorAlpha);
             AlphaUpdateListener.updateVisibility(hotseat);
-            if (getPageIndicator() != null) {
-                getPageIndicator().setAlpha(finalHotseatAndPageIndicatorAlpha);
-                AlphaUpdateListener.updateVisibility(getPageIndicator());
+            if (pageIndicator != null) {
+                pageIndicator.setAlpha(finalHotseatAndPageIndicatorAlpha);
+                AlphaUpdateListener.updateVisibility(pageIndicator);
             }
             searchBar.setAlpha(finalSearchBarAlpha);
             AlphaUpdateListener.updateVisibility(searchBar);
@@ -3984,7 +4017,6 @@
         // hardware layers on children are enabled on startup, but should be disabled until
         // needed
         updateChildrenLayersEnabled(false);
-        setWallpaperDimension();
     }
 
     /**
@@ -4206,6 +4238,16 @@
     }
 
     @Override
+    public boolean supportsAppInfoDropTarget() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsDeleteDropTarget() {
+        return true;
+    }
+
+    @Override
     public void onFlingToDelete(DragObject d, int x, int y, PointF vec) {
         // Do nothing
     }
@@ -4237,7 +4279,9 @@
         if (mSavedStates != null) {
             mRestoredPages.add(child);
             CellLayout cl = (CellLayout) getChildAt(child);
-            cl.restoreInstanceState(mSavedStates);
+            if (cl != null) {
+                cl.restoreInstanceState(mSavedStates);
+            }
         }
     }