Desktop needs repaint after exit from Open Arena

I'm not sure who gets to field this one...

After exiting Open Arena, the desktop is pretty much black except for approximately 300x200 (perhaps 400x300 or 640x480?) area near the upper left corner of the screen. Left click and hold a desktop icon, then drag around, allows me to 'paint in' the desktop.

I've got a Dell GX270 with a NVIDIA card using NVIDIA accelerated graphics driver (version 173)

$ lsb_release -rd
Description: Ubuntu 10.10
Release: 10.10

$ uname -a
Linux germain 2.6.35-23-generic #41-Ubuntu SMP Wed Nov 24 10:18:49 UTC 2010 i686 GNU/Linux

$ apt-cache pkgnames | grep openarena
openarena-server
openarena
openarena-data

$ apt-cache showpkg openarena
Package: openarena
Versions:
0.8.5-4 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_maverick_universe_binary-i386_Packages) (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_maverick_universe_binary-i386_Packages
                  MD5: 5c88c938032f434f395e780475e66fe0