After lots of difficulties hanging my maching with apm, I
lost the ability to log out of gnome. The menu item is
still there, and it seems to click ok, but nothing happens.
There doesn't seem to be any documentation describing what's
going on behind the scenes, which I'll refrain from
submitting as another bug. Also, there are tons of error
messages on the console after exiting gnome/X, the last of
which is something like 'unreferenced style'. I can check
and submit that/those too if you want.
More information is required to debug this bug.
Try upgrading to a newer version of GNOME, too.
That should fix most of those problems