full screen crashes: drm_i830_cmdbuffer: -22

Heya, anyone else seeing this? When I use the \ key to switch to fullscreen, XBMC often core dumps with the message "drm_i830_cmdbuffer: -22". Not always, and it seems to depend on what screen I'm on (it always does it on the home screen, never does it in the video list, and sometimes does it while watching a video).

Hardware is a Mac Mini, which I know is a little weird.

Thanks
-b

It does look like this is a fairly common error in many applications:
http://www.google.com/search?q=drm_i830_...rt=10&sa=N