This seems to have been some kind of glitch on my box only as it went away when I uninstalled and reinstalled last-exit.
** Changed in: last-exit (Ubuntu) Status: Unconfirmed => Rejected -- No icon for last-exit in menu https://launchpad.net/bugs/66441 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs