I have the same problem with Feisty. When logging in shutdown button and volume icon can appear in random places in the panel. So at shut down, it could be that you have volume, clock then shutdown button, but upon logging in you might have shutdown button, volume, clock. All the icons are locked aand must be unlocked to be put back in their proper places. Also, the network manager icon may disappear at random times during the session. However when this happens, the connection is not lost, only the icon disappears.
-- 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
