Comment 29 for bug 424511

Sorry, I forgot to mention this... FWIW I don't think there's a problem with Gnome-Panel. I think it's managed by the window manager, so if metacity or compiz runs Gnome-Panel is active. If the icons are not locked to the panel, they may move when Gnome-Panel is restored by the window manager. But the source of the symptoms is the window manager.

Also, the symptoms I described started the second day of operation after shutting down. The first day after the upgrade everything appeared to function normally. Oh! There were a few additional updates after that. I don't know what they were, or how to track them down, but I wonder if a recent Ubuntu update is responsible?