diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/widgets/qmainwindowlayout_mac.mm
--- a/src/gui/widgets/qmainwindowlayout_mac.mm	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/widgets/qmainwindowlayout_mac.mm	Tue Feb 02 00:43:10 2010 +0200
@@ -463,9 +463,6 @@
             NSToolbarItem *item = static_cast<NSToolbarItem *>(it.key());
             [[qt_mac_window_for(layoutState.mainWindow->window()) toolbar]
                 removeItemAtIndex:toolbarItemsCopy.indexOf(item)];
-            // In Carbon this hash and list gets emptied via events. In Cocoa, we have to do it ourselves here.
-            it = unifiedToolbarHash.erase(it);
-            qtoolbarsInUnifiedToolbarList.removeAll(toolbar);
 #endif
             break;
         }