diff --git a/src/com/android/launcher2/AllApps3D.java b/src/com/android/launcher2/AllApps3D.java
index 308ad28..15b98bf 100644
--- a/src/com/android/launcher2/AllApps3D.java
+++ b/src/com/android/launcher2/AllApps3D.java
@@ -213,6 +213,7 @@
             destroyRenderScript();
             sRS = null;
             sRollo = null;
+            super.onDetachedFromWindow();
         }
     }
 
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index e611303..b361ab5 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -48,6 +48,7 @@
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
 import android.os.Parcelable;
 import android.os.SystemClock;
@@ -231,7 +232,8 @@
         mAppWidgetHost.startListening();
 
         if (PROFILE_STARTUP) {
-            android.os.Debug.startMethodTracing("/sdcard/launcher");
+            android.os.Debug.startMethodTracing(
+                    Environment.getExternalStorageDirectory() + "/launcher");
         }
 
         loadHotseats();
diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index c182209..d193448 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -726,10 +726,12 @@
                         getLocationOnScreen(mTempCell);
                         // Send a tap to the wallpaper if the last down was on empty space
                         final int pointerIndex = ev.findPointerIndex(mActivePointerId);
-                        mWallpaperManager.sendWallpaperCommand(getWindowToken(), 
-                                "android.wallpaper.tap",
-                                mTempCell[0] + (int) ev.getX(pointerIndex),
-                                mTempCell[1] + (int) ev.getY(pointerIndex), 0, null);
+                        if (pointerIndex >= 0) {
+                            mWallpaperManager.sendWallpaperCommand(getWindowToken(),
+                                    "android.wallpaper.tap",
+                                    mTempCell[0] + (int) ev.getX(pointerIndex),
+                                    mTempCell[1] + (int) ev.getY(pointerIndex), 0, null);
+                        }
                     }
                 }