[CentOS] Problems logging out....

I just started having some trouble logging out from my CentOS 5.1 system. For some reason, when I try to log out, the log out program hangs. This happens whether I click on the "Log Out" button or wait for the timeout. When I looked, I somehow (I forget how) found out that the clock applet would not go away. However, when I separately killed the clock applet, the session still refused to log out. The only way I could get the session logged out was to kill the gnome-session process (works like a charm).

I thought this might be related to the new xorg server update problem from upstream, but the new one doesn't fix it (not surprised).

Any clues, or is this a gnome-only issue?

Thanks.

mhr