diff --git a/libs/utils/RefBase.cpp b/libs/utils/RefBase.cpp
index f934eec..0fd404d 100644
--- a/libs/utils/RefBase.cpp
+++ b/libs/utils/RefBase.cpp
@@ -20,7 +20,6 @@
 
 #include <utils/Atomic.h>
 #include <utils/CallStack.h>
-#include <utils/KeyedVector.h>
 #include <utils/Log.h>
 #include <utils/threads.h>
 #include <utils/TextOutput.h>
@@ -35,6 +34,7 @@
 
 // compile with refcounting debugging enabled
 #define DEBUG_REFS                      0
+#define DEBUG_REFS_FATAL_SANITY_CHECKS  0
 #define DEBUG_REFS_ENABLED_BY_DEFAULT   1
 #define DEBUG_REFS_CALLSTACK_ENABLED    1
 
@@ -70,8 +70,10 @@
 
     void addStrongRef(const void* /*id*/) { }
     void removeStrongRef(const void* /*id*/) { }
+    void renameStrongRefId(const void* /*old_id*/, const void* /*new_id*/) { }
     void addWeakRef(const void* /*id*/) { }
     void removeWeakRef(const void* /*id*/) { }
+    void renameWeakRefId(const void* /*old_id*/, const void* /*new_id*/) { }
     void printRefs() const { }
     void trackMe(bool, bool) { }
 
@@ -87,39 +89,73 @@
         , mTrackEnabled(!!DEBUG_REFS_ENABLED_BY_DEFAULT)
         , mRetain(false)
     {
-        //LOGI("NEW weakref_impl %p for RefBase %p", this, base);
     }
     
     ~weakref_impl()
     {
-        LOG_ALWAYS_FATAL_IF(!mRetain && mStrongRefs != NULL, "Strong references remain!");
-        LOG_ALWAYS_FATAL_IF(!mRetain && mWeakRefs != NULL, "Weak references remain!");
+        bool dumpStack = false;
+        if (!mRetain && mStrongRefs != NULL) {
+            dumpStack = true;
+#if DEBUG_REFS_FATAL_SANITY_CHECKS
+            LOG_ALWAYS_FATAL("Strong references remain!");
+#else
+            LOGE("Strong references remain!");
+#endif
+        }
+
+        if (!mRetain && mWeakRefs != NULL) {
+            dumpStack = true;
+#if DEBUG_REFS_FATAL_SANITY_CHECKS
+            LOG_ALWAYS_FATAL("Weak references remain!");
+#else
+            LOGE("Weak references remain!");
+#endif
+        }
+
+        if (dumpStack) {
+            CallStack stack;
+            stack.update();
+            stack.dump();
+        }
     }
 
-    void addStrongRef(const void* id)
-    {
+    void addStrongRef(const void* id) {
+        //LOGD_IF(mTrackEnabled,
+        //        "addStrongRef: RefBase=%p, id=%p", mBase, id);
         addRef(&mStrongRefs, id, mStrong);
     }
 
-    void removeStrongRef(const void* id)
-    {
-        if (!mRetain)
+    void removeStrongRef(const void* id) {
+        //LOGD_IF(mTrackEnabled,
+        //        "removeStrongRef: RefBase=%p, id=%p", mBase, id);
+        if (!mRetain) {
             removeRef(&mStrongRefs, id);
-        else
+        } else {
             addRef(&mStrongRefs, id, -mStrong);
+        }
     }
 
-    void addWeakRef(const void* id)
-    {
+    void renameStrongRefId(const void* old_id, const void* new_id) {
+        //LOGD_IF(mTrackEnabled,
+        //        "renameStrongRefId: RefBase=%p, oid=%p, nid=%p",
+        //        mBase, old_id, new_id);
+        renameRefsId(mStrongRefs, old_id, new_id);
+    }
+
+    void addWeakRef(const void* id) {
         addRef(&mWeakRefs, id, mWeak);
     }
 
-    void removeWeakRef(const void* id)
-    {
-        if (!mRetain)
+    void removeWeakRef(const void* id) {
+        if (!mRetain) {
             removeRef(&mWeakRefs, id);
-        else
+        } else {
             addRef(&mWeakRefs, id, -mWeak);
+        }
+    }
+
+    void renameWeakRefId(const void* old_id, const void* new_id) {
+        renameRefsId(mWeakRefs, old_id, new_id);
     }
 
     void trackMe(bool track, bool retain)
@@ -133,8 +169,7 @@
         String8 text;
 
         {
-            AutoMutex _l(const_cast<weakref_impl*>(this)->mMutex);
-    
+            Mutex::Autolock _l(const_cast<weakref_impl*>(this)->mMutex);
             char buf[128];
             sprintf(buf, "Strong references on RefBase %p (weakref_type %p):\n", mBase, this);
             text.append(buf);
@@ -173,6 +208,7 @@
     {
         if (mTrackEnabled) {
             AutoMutex _l(mMutex);
+
             ref_entry* ref = new ref_entry;
             // Reference count at the time of the snapshot, but before the
             // update.  Positive value means we increment, negative--we
@@ -182,7 +218,6 @@
 #if DEBUG_REFS_CALLSTACK_ENABLED
             ref->stack.update(2);
 #endif
-            
             ref->next = *refs;
             *refs = ref;
         }
@@ -200,13 +235,37 @@
                     delete ref;
                     return;
                 }
-                
                 refs = &ref->next;
                 ref = *refs;
             }
-            
-            LOG_ALWAYS_FATAL("RefBase: removing id %p on RefBase %p (weakref_type %p) that doesn't exist!",
-                             id, mBase, this);
+
+#if DEBUG_REFS_FATAL_SANITY_CHECKS
+            LOG_ALWAYS_FATAL("RefBase: removing id %p on RefBase %p"
+                    "(weakref_type %p) that doesn't exist!",
+                    id, mBase, this);
+#endif
+
+            LOGE("RefBase: removing id %p on RefBase %p"
+                    "(weakref_type %p) that doesn't exist!",
+                    id, mBase, this);
+
+            CallStack stack;
+            stack.update();
+            stack.dump();
+        }
+    }
+
+    void renameRefsId(ref_entry* r, const void* old_id, const void* new_id)
+    {
+        if (mTrackEnabled) {
+            AutoMutex _l(mMutex);
+            ref_entry* ref = r;
+            while (ref != NULL) {
+                if (ref->id == old_id) {
+                    ref->id = new_id;
+                }
+                ref = ref->next;
+            }
         }
     }
 
@@ -236,44 +295,6 @@
     // on removeref that match the address ones.
     bool mRetain;
 
-#if 0
-    void addRef(KeyedVector<const void*, int32_t>* refs, const void* id)
-    {
-        AutoMutex _l(mMutex);
-        ssize_t i = refs->indexOfKey(id);
-        if (i >= 0) {
-            ++(refs->editValueAt(i));
-        } else {
-            i = refs->add(id, 1);
-        }
-    }
-
-    void removeRef(KeyedVector<const void*, int32_t>* refs, const void* id)
-    {
-        AutoMutex _l(mMutex);
-        ssize_t i = refs->indexOfKey(id);
-        LOG_ALWAYS_FATAL_IF(i < 0, "RefBase: removing id %p that doesn't exist!", id);
-        if (i >= 0) {
-            int32_t val = --(refs->editValueAt(i));
-            if (val == 0) {
-                refs->removeItemsAt(i);
-            }
-        }
-    }
-
-    void printRefs(const KeyedVector<const void*, int32_t>& refs)
-    {
-        const size_t N=refs.size();
-        for (size_t i=0; i<N; i++) {
-            printf("\tID %p: %d remain\n", refs.keyAt(i), refs.valueAt(i));
-        }
-    }
-
-    mutable Mutex mMutex;
-    KeyedVector<const void*, int32_t> mStrongRefs;
-    KeyedVector<const void*, int32_t> mWeakRefs;
-#endif
-
 #endif
 };
 
@@ -282,7 +303,6 @@
 void RefBase::incStrong(const void* id) const
 {
     weakref_impl* const refs = mRefs;
-    refs->addWeakRef(id);
     refs->incWeak(id);
     
     refs->addStrongRef(id);
@@ -314,14 +334,12 @@
             delete this;
         }
     }
-    refs->removeWeakRef(id);
     refs->decWeak(id);
 }
 
 void RefBase::forceIncStrong(const void* id) const
 {
     weakref_impl* const refs = mRefs;
-    refs->addWeakRef(id);
     refs->incWeak(id);
     
     refs->addStrongRef(id);
@@ -373,7 +391,7 @@
         if (impl->mStrong == INITIAL_STRONG_VALUE)
             delete impl->mBase;
         else {
-//            LOGV("Freeing refs %p of old RefBase %p\n", this, impl->mBase);
+            // LOGV("Freeing refs %p of old RefBase %p\n", this, impl->mBase);
             delete impl;
         }
     } else {
@@ -433,7 +451,6 @@
         }
     }
     
-    impl->addWeakRef(id);
     impl->addStrongRef(id);
 
 #if PRINT_REFS
@@ -451,7 +468,7 @@
 bool RefBase::weakref_type::attemptIncWeak(const void* id)
 {
     weakref_impl* const impl = static_cast<weakref_impl*>(this);
-    
+
     int32_t curCount = impl->mWeak;
     LOG_ASSERT(curCount >= 0, "attemptIncWeak called on %p after underflow",
                this);
@@ -498,14 +515,11 @@
 RefBase::RefBase()
     : mRefs(new weakref_impl(this))
 {
-//    LOGV("Creating refs %p with RefBase %p\n", mRefs, this);
 }
 
 RefBase::~RefBase()
 {
-//    LOGV("Destroying RefBase %p (refs %p)\n", this, mRefs);
     if (mRefs->mWeak == 0) {
-//        LOGV("Freeing refs %p of old RefBase %p\n", mRefs, this);
         delete mRefs;
     }
 }
@@ -534,6 +548,23 @@
 
 // ---------------------------------------------------------------------------
 
+void RefBase::moveReferences(void* dst, void const* src, size_t n,
+        const ReferenceConverterBase& caster)
+{
+#if DEBUG_REFS
+    const size_t itemSize = caster.getReferenceTypeSize();
+    for (size_t i=0 ; i<n ; i++) {
+        void*       d = reinterpret_cast<void      *>(intptr_t(dst) + i*itemSize);
+        void const* s = reinterpret_cast<void const*>(intptr_t(src) + i*itemSize);
+        RefBase* ref(reinterpret_cast<RefBase*>(caster.getReferenceBase(d)));
+        ref->mRefs->renameStrongRefId(s, d);
+        ref->mRefs->renameWeakRefId(s, d);
+    }
+#endif
+}
+
+// ---------------------------------------------------------------------------
+
 TextOutput& printStrongPointer(TextOutput& to, const void* val)
 {
     to << "sp<>(" << val << ")";