this happens to me too but only if the gdm resolution is different to the resolution of my desktop it also happens to me sometimes when changing resolution normally. if gdm is the same res as ur desktop it might fix it.
-- [Dapper] GNOME Panel icons (on right side) move apparently randomly on session start in some situations https://launchpad.net/bugs/44082 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
