Originally posted by theory:
Thats weird. Does it quit though when you do kill -9?
Try getting rid of any docklings you have and
menu extras and see if that helps.
kill -9 didn't quit it either, but what's weird is that it is only the apple menu-extras that has hung - not the only other 3rd party, SE clicker.
top says that 2 processes are stuck, which got to be the two systemUIservices that show in process viewer.
Guess its re-logging in for me *sigh*
(OS X has spoilt me

)