Lately I have been having trouble with display locking on my when I select File from the OpenOffice menu at the top of the app's window.  The system is fine, but X is consuming 100% of one processor (I have 2).  The mouse pointer will move, but no keyboard input is accepted and nothing on the screen is updated.

I can log in on another terminal and kill openoffice, but that doesn't help.  I have also tried killing the window manager (ctwm) and killing X.  Killing X will drop the load on the system, but it will not release the graphics display or the keyboard.

I checked Xorg.0.log this last time, but there are no messages streaming into it or anything like other bugs have reported (perhaps I need debugging turned on?)

It seems that the problem appeared after upgrading my kernel from 2.6.17 to 2.6.19, but I'm not positive.  Next time it happens, I will boot to the other kernel and see if that makes a difference.

System info:
Gentoo distribution
gentoo-sources 2.6.19-r5
xorg-x11 7.1
xorg-server 1.1.1-r5
xf86-video-mga 1.4.2 (I have also tried 1.4.6.1, which behaves the same way)
ctwm 3.7

I can submit the Xorg.0.log file if that would be helpful.  Is there anything else I can do to provide more helpful information?