I'm completely under Dapper since a while now. I solved my problem by removing all .gnome directories and by restoring some settings later. I can't reproduce the bug anymore... I guess that if I'm the onlyone who had this problem, you can close it now.
-- modified menu under Breezy are not correctly reinitialised under Dapper https://launchpad.net/bugs/42833 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs