diff --git a/AppKit/CPTableColumn.j b/AppKit/CPTableColumn.j
index 4484e266d..6d37c1de9 100644
--- a/AppKit/CPTableColumn.j
+++ b/AppKit/CPTableColumn.j
@@ -72,9 +72,9 @@ CPTableColumnUserResizingMask   = 2;
 
     CPView      _dataView;                  // default data view for this column
 
-    Object      _dataViewData;              // cache of data view archives (key=data view hash, value=data view archive)
-    Object      _dataViewForView;           // mapping from view instances back to their data view prototype (key=view instance hash, value=data view)
-    Object      _purgableInfosForDataView;  // (key=data view hash, value=)
+    Object      _dataViewData;              // cache of data view archives (key=data view UID, value=data view archive)
+    Object      _dataViewForView;           // mapping from view instances back to their data view prototype (key=view instance UID, value=data view)
+    Object      _purgableInfosForDataView;  // (key=data view UID, value=)
 }
 
 /*!
@@ -290,10 +290,10 @@ CPTableColumnUserResizingMask;
 - (void)setDataView:(CPView <CPCoding>)aView
 {
     if (_dataView)
-        _dataViewData[[_dataView hash]] = nil;
+        _dataViewData[[_dataView UID]] = nil;
     
     _dataView = aView;
-    _dataViewData[[aView hash]] = [CPKeyedArchiver archivedDataWithRootObject:aView];
+    _dataViewData[[aView UID]] = [CPKeyedArchiver archivedDataWithRootObject:aView];
 }
 
 /*!
@@ -330,42 +330,42 @@ CPTableColumnUserResizingMask;
 /*
 - (void)_markViewAsPurgable:(CPView)aView
 {
-    var viewHash = [aView hash],
-        dataViewHash = [_dataViewForView[viewHash] hash];
+    var viewUID = [aView UID],
+        dataViewUID = [_dataViewForView[viewUID] UID];
     
-    if (!_purgableInfosForDataView[dataViewHash])
-        _purgableInfosForDataView[dataViewHash] = [CPDictionary dictionary];
+    if (!_purgableInfosForDataView[dataViewUID])
+        _purgableInfosForDataView[dataViewUID] = [CPDictionary dictionary];
     
-    [_purgableInfosForDataView[dataViewHash] setObject:aView forKey:viewHash];
+    [_purgableInfosForDataView[dataViewUID] setObject:aView forKey:viewUID];
 }
 */
 - (void)_markView:(CPView)aView inRow:(unsigned)aRow asPurgable:(BOOL)isPurgable
 {
-    var viewHash = [aView hash],
-        dataViewHash = [_dataViewForView[viewHash] hash];
+    var viewUID = [aView UID],
+        dataViewUID = [_dataViewForView[viewUID] UID];
     
-    if (!_purgableInfosForDataView[dataViewHash])
+    if (!_purgableInfosForDataView[dataViewUID])
     {
         if (!isPurgable)
             return;
         
-        _purgableInfosForDataView[dataViewHash] = {};
+        _purgableInfosForDataView[dataViewUID] = {};
     }
     
     if (!isPurgable) {
-        if (_purgableInfosForDataView[dataViewHash][viewHash])
-            CPLog.warn("removing unpurgable " + _purgableInfosForDataView[dataViewHash][viewHash]);
-        delete _purgableInfosForDataView[dataViewHash][viewHash];   
+        if (_purgableInfosForDataView[dataViewUID][viewUID])
+            CPLog.warn("removing unpurgable " + _purgableInfosForDataView[dataViewUID][viewUID]);
+        delete _purgableInfosForDataView[dataViewUID][viewUID];   
     }
     else
-        _purgableInfosForDataView[dataViewHash][viewHash] = PurgableInfoMake(aView, aRow);
+        _purgableInfosForDataView[dataViewUID][viewUID] = PurgableInfoMake(aView, aRow);
 }
 
 - (CPView)_newDataViewForRow:(int)aRowIndex avoidingRows:(CPRange)rows
 {
     var view = [self dataViewForRow:aRowIndex],
-        viewHash = [view hash],
-        purgableInfos = _purgableInfosForDataView[viewHash];
+        viewUID = [view UID],
+        purgableInfos = _purgableInfosForDataView[viewUID];
     
     if (purgableInfos)
     {
@@ -384,14 +384,14 @@ CPTableColumnUserResizingMask;
     }
     
     // if we haven't cached an archive of the data view, do it now
-    if (!_dataViewData[viewHash])
-        _dataViewData[viewHash] = [CPKeyedArchiver archivedDataWithRootObject:view];
+    if (!_dataViewData[viewUID])
+        _dataViewData[viewUID] = [CPKeyedArchiver archivedDataWithRootObject:view];
 
     // unarchive the data view cache
-    var newView = [CPKeyedUnarchiver unarchiveObjectWithData:_dataViewData[viewHash]];
+    var newView = [CPKeyedUnarchiver unarchiveObjectWithData:_dataViewData[viewUID]];
     
-    // map the new view's hash to it's data view prototype
-    _dataViewForView[[newView hash]] = view;
+    // map the new view's UID to it's data view prototype
+    _dataViewForView[[newView UID]] = view;
     
     CPLog.warn("creating cell: %s", newView);
     
@@ -400,9 +400,9 @@ CPTableColumnUserResizingMask;
 
 - (void)_purge
 {
-    for (var viewHash in _purgableInfosForDataView)
+    for (var viewUID in _purgableInfosForDataView)
     {
-        var purgableInfos = _purgableInfosForDataView[viewHash];
+        var purgableInfos = _purgableInfosForDataView[viewUID];
 
         for (var key in purgableInfos)
         {
diff --git a/AppKit/CPToolbar.j b/AppKit/CPToolbar.j
index 7d976b513..f292d7631 100644
--- a/AppKit/CPToolbar.j
+++ b/AppKit/CPToolbar.j
@@ -725,7 +725,7 @@ var _CPToolbarItemInfoMake = function(anIndex, aView, aLabel, aMinWidth)
 
 - (CPView)viewForItem:(CPToolbarItem)anItem
 {
-    var info = [_itemInfos objectForKey:[anItem hash]];
+    var info = [_itemInfos objectForKey:[anItem UID]];
     
     if (!info)
         return nil;
@@ -735,7 +735,7 @@ var _CPToolbarItemInfoMake = function(anIndex, aView, aLabel, aMinWidth)
 
 - (CPTextField)labelForItem:(CPToolbarItem)anItem
 {
-    var info = [_itemInfos objectForKey:[anItem hash]];
+    var info = [_itemInfos objectForKey:[anItem UID]];
     
     if (!info)
         return nil;
@@ -745,7 +745,7 @@ var _CPToolbarItemInfoMake = function(anIndex, aView, aLabel, aMinWidth)
 
 - (float)minWidthForItem:(CPToolbarItem)anItem
 {
-    var info = [_itemInfos objectForKey:[anItem hash]];
+    var info = [_itemInfos objectForKey:[anItem UID]];
     
     if (!info)
         return 0;
@@ -814,7 +814,7 @@ var _CPToolbarItemInfoMake = function(anIndex, aView, aLabel, aMinWidth)
         var minSize = [item minSize],
             minWidth = MAX(minSize.width, CGRectGetWidth([label frame]));
             
-        [_itemInfos setObject:_CPToolbarItemInfoMake(index, view, label, minWidth) forKey:[item hash]];
+        [_itemInfos setObject:_CPToolbarItemInfoMake(index, view, label, minWidth) forKey:[item UID]];
         
         _minWidth += minWidth + TOOLBAR_ITEM_MARGIN;
         
diff --git a/AppKit/CPView.j b/AppKit/CPView.j
index 2974ed616..3bc588813 100644
--- a/AppKit/CPView.j
+++ b/AppKit/CPView.j
@@ -143,8 +143,6 @@ var DOMElementPrototype         = nil,
     BOOL                _postsBoundsChangedNotifications;
     BOOL                _inhibitFrameAndBoundsChangedNotifications;
     
-    CPString            _displayHash;
-    
 #if PLATFORM(DOM)
     DOMElement          _DOMElement;
     DOMElement          _DOMContentsElement;
@@ -242,8 +240,6 @@ var DOMElementPrototype         = nil,
         _isHidden = NO;
         _hitTests = YES;
 
-        _displayHash = [self hash];
-
 #if PLATFORM(DOM)
         _DOMElement = DOMElementPrototype.cloneNode(false);
         
@@ -1535,13 +1531,13 @@ setBoundsOrigin:
 - (void)setNeedsDisplayInRect:(CPRect)aRect
 {
 #if PLATFORM(DOM)
-    var hash = [[self class] hash],
-        hasCustomDrawRect = CustomDrawRectViews[hash];
+    var UID = [[self class] UID],
+        hasCustomDrawRect = CustomDrawRectViews[UID];
     
     if (!hasCustomDrawRect && typeof hasCustomDrawRect === "undefined")
     {
         hasCustomDrawRect = [self methodForSelector:@selector(drawRect:)] != [CPView instanceMethodForSelector:@selector(drawRect:)];
-        CustomDrawRectViews[hash] = hasCustomDrawRect;
+        CustomDrawRectViews[UID] = hasCustomDrawRect;
     }
 
     if (!hasCustomDrawRect)
@@ -1666,13 +1662,13 @@ setBoundsOrigin:
     _needsLayout = YES;
     
 #if PLATFORM(DOM)
-    var hash = [[self class] hash],
-        hasCustomLayoutSubviews = CustomLayoutSubviewsViews[hash];
+    var UID = [[self class] UID],
+        hasCustomLayoutSubviews = CustomLayoutSubviewsViews[UID];
     
     if (hasCustomLayoutSubviews === undefined)
     {
         hasCustomLayoutSubviews = [self methodForSelector:@selector(layoutSubviews)] != [CPView instanceMethodForSelector:@selector(layoutSubviews)];
-        CustomLayoutSubviewsViews[hash] = hasCustomLayoutSubviews;
+        CustomLayoutSubviewsViews[UID] = hasCustomLayoutSubviews;
     }
 
     if (!hasCustomLayoutSubviews)
@@ -2256,7 +2252,6 @@ var CPViewAutoresizingMaskKey       = @"CPViewAutoresizingMask",
             //_subviews[index]._superview = self;
         }
 #endif
-        _displayHash = [self hash];
 
         if ([aCoder containsValueForKey:CPViewIsHiddenKey])
             [self setHidden:[aCoder decodeBoolForKey:CPViewIsHiddenKey]];
diff --git a/AppKit/Cib/CPCibLoading.j b/AppKit/Cib/CPCibLoading.j
index dea773582..0ab07aef6 100644
--- a/AppKit/Cib/CPCibLoading.j
+++ b/AppKit/Cib/CPCibLoading.j
@@ -43,7 +43,7 @@ var LoadInfoForCib = {};
 {
     var cib = [[CPCib alloc] initWithContentsOfURL:anAbsolutePath loadDelegate:self];
 
-    LoadInfoForCib[[cib hash]] = { loadDelegate:aDelegate, externalNameTable:aNameTable };
+    LoadInfoForCib[[cib UID]] = { loadDelegate:aDelegate, externalNameTable:aNameTable };
 }
 
 + (void)loadCibNamed:(CPString)aName owner:(id)anOwner loadDelegate:(id)aDelegate
@@ -59,14 +59,14 @@ var LoadInfoForCib = {};
 {
     var cib = [[CPCib alloc] initWithCibNamed:aFileName bundle:self loadDelegate:[self class]];
 
-    LoadInfoForCib[[cib hash]] = { loadDelegate:aDelegate, externalNameTable:aNameTable };
+    LoadInfoForCib[[cib UID]] = { loadDelegate:aDelegate, externalNameTable:aNameTable };
 }
 
 + (void)cibDidFinishLoading:(CPCib)aCib
 {
-    var loadInfo = LoadInfoForCib[[aCib hash]];
+    var loadInfo = LoadInfoForCib[[aCib UID]];
     
-    delete LoadInfoForCib[[aCib hash]];
+    delete LoadInfoForCib[[aCib UID]];
     
     [aCib instantiateCibWithExternalNameTable:loadInfo.externalNameTable];
     
diff --git a/AppKit/Cib/_CPCibConnector.j b/AppKit/Cib/_CPCibConnector.j
index 2a134492b..6ddd6ce05 100644
--- a/AppKit/Cib/_CPCibConnector.j
+++ b/AppKit/Cib/_CPCibConnector.j
@@ -16,12 +16,12 @@ var _CPCibConnectorSourceKey        = @"_CPCibConnectorSourceKey",
 
 - (void)replaceObjects:(JSObject)replacementObjects
 {
-    var replacement = replacementObjects[[_source hash]];
+    var replacement = replacementObjects[[_source UID]];
 
     if (replacement !== undefined)
         _source = replacement;
 
-    replacement = replacementObjects[[_destination hash]];
+    replacement = replacementObjects[[_destination UID]];
 
     if (replacement !== undefined)
         _destination = replacement;
diff --git a/AppKit/Cib/_CPCibObjectData.j b/AppKit/Cib/_CPCibObjectData.j
index 5a5525ea7..a5deb3bf6 100644
--- a/AppKit/Cib/_CPCibObjectData.j
+++ b/AppKit/Cib/_CPCibObjectData.j
@@ -119,7 +119,7 @@
         objectEnumerator = [_visibleWindows objectEnumerator];
 
     while (object = [objectEnumerator nextObject])
-        [_replacementObjects[[object hash]] makeKeyAndOrderFront:self];
+        [_replacementObjects[[object UID]] makeKeyAndOrderFront:self];
 }
 
 @end
@@ -242,7 +242,7 @@ var _CPCibObjectDataNamesKeysKey                = @"_CPCibObjectDataNamesKeysKey
 
             if (instantiatedObject !== object)
             {
-                _replacementObjects[[object hash]] = instantiatedObject;
+                _replacementObjects[[object UID]] = instantiatedObject;
 
                 if ([instantiatedObject isKindOfClass:[CPView class]])
                 {
@@ -266,7 +266,7 @@ var _CPCibObjectDataNamesKeysKey                = @"_CPCibObjectDataNamesKeysKey
 
 - (void)establishConnectionsWithOwner:(id)anOwner topLevelObjects:(CPMutableArray)topLevelObjects
 {
-    _replacementObjects[[_fileOwner hash]] = anOwner;
+    _replacementObjects[[_fileOwner UID]] = anOwner;
 
     var index = 0,
         count = _connections.length;
@@ -287,7 +287,7 @@ var _CPCibObjectDataNamesKeysKey                = @"_CPCibObjectDataNamesKeysKey
     while (count--)
     {
         var object = _objectsKeys[count],
-            instantiatedObject = _replacementObjects[[object hash]];
+            instantiatedObject = _replacementObjects[[object UID]];
 
         if (instantiatedObject)
             object = instantiatedObject;
diff --git a/AppKit/CoreAnimation/CALayer.j b/AppKit/CoreAnimation/CALayer.j
index baef5f944..85e415787 100644
--- a/AppKit/CoreAnimation/CALayer.j
+++ b/AppKit/CoreAnimation/CALayer.j
@@ -779,9 +779,9 @@ if (_DOMContentsElement && aLayer._zPosition > _DOMContentsElement.style.zIndex)
 + (void)runLoopUpdateLayers
 {if (window.oops) {alert(window.latest); objj_debug_print_backtrace();}
     window.loop = true;
-    for (hash in CALayerRegisteredRunLoopUpdates)
+    for (UID in CALayerRegisteredRunLoopUpdates)
     {
-        var layer = CALayerRegisteredRunLoopUpdates[hash],
+        var layer = CALayerRegisteredRunLoopUpdates[UID],
             mask = layer._runLoopUpdateMask;
 
         if (mask & CALayerDOMUpdateMask)
@@ -813,7 +813,7 @@ if (_DOMContentsElement && aLayer._zPosition > _DOMContentsElement.style.zIndex)
     }
     
     _runLoopUpdateMask |= anUpdateMask;
-    CALayerRegisteredRunLoopUpdates[[self hash]] = self;
+    CALayerRegisteredRunLoopUpdates[[self UID]] = self;
 }
 
 /*
diff --git a/AppKit/Platform/DOM/CPDOMDisplayServer.h b/AppKit/Platform/DOM/CPDOMDisplayServer.h
index 9216ab901..c094205fa 100644
--- a/AppKit/Platform/DOM/CPDOMDisplayServer.h
+++ b/AppKit/Platform/DOM/CPDOMDisplayServer.h
@@ -104,20 +104,20 @@
 
 #define CPDOMDisplayServerAddView(aView)\
     {\
-        var ___hash = [aView hash];\
-        if (typeof (CPDOMDisplayServerViewsContext[___hash]) == "undefined")\
+        var ___UID = [aView UID];\
+        if (typeof (CPDOMDisplayServerViewsContext[___UID]) == "undefined")\
         {\
             CPDOMDisplayServerViews[CPDOMDisplayServerViewsCount++] = aView;\
-            CPDOMDisplayServerViewsContext[___hash] = aView;\
+            CPDOMDisplayServerViewsContext[___UID] = aView;\
         }\
     }\
 
 #define CPDOMDisplayServerRemoveView(aView)\
     {\
-        var index = CPDOMDisplayServerViewsContext[[aView hash]];\
+        var index = CPDOMDisplayServerViewsContext[[aView UID]];\
         if (typeof index != "undefined") \
         {\
-            CPDOMDisplayServerViewsContext[[aView hash]];\
+            CPDOMDisplayServerViewsContext[[aView UID]];\
             CPDOMDisplayServerViews[index] = NULL;\
         }\
     }\
diff --git a/AppKit/Platform/DOM/CPDOMDisplayServer.j b/AppKit/Platform/DOM/CPDOMDisplayServer.j
index 2c77e40e3..b4e974646 100644
--- a/AppKit/Platform/DOM/CPDOMDisplayServer.j
+++ b/AppKit/Platform/DOM/CPDOMDisplayServer.j
@@ -150,7 +150,7 @@ CPDOMDisplayServerViewsContext          = {};
         {
             var view = views[index];
             
-            delete CPDOMDisplayServerViewsContext[[view hash]];
+            delete CPDOMDisplayServerViewsContext[[view UID]];
             
             [view layoutIfNeeded];
             [view displayIfNeeded];