diff -r 2f34d5167611 -r fcece45ef507 src/gui/widgets/qmainwindowlayout_mac.mm
--- a/src/gui/widgets/qmainwindowlayout_mac.mm	Fri Apr 16 15:50:13 2010 +0300
+++ b/src/gui/widgets/qmainwindowlayout_mac.mm	Mon May 03 13:17:34 2010 +0300
@@ -463,6 +463,8 @@
             NSToolbarItem *item = static_cast<NSToolbarItem *>(it.key());
             [[qt_mac_window_for(layoutState.mainWindow->window()) toolbar]
                 removeItemAtIndex:toolbarItemsCopy.indexOf(item)];
+             unifiedToolbarHash.remove(item);
+             qtoolbarsInUnifiedToolbarList.removeAll(toolbar);
 #endif
             break;
         }