Trout is quite right, that error is down to the bumpification mod, I never saw the problem until I installed the mod. Anyway the fix is here;
http://www.dangerdogz.com/forums/index.php/topic,7490.msg62780.html#msg62780
Jabo
P.S. Sorry Jim, don't know about the problem you originally posted. Have you updated any drivers recently? Was it the first time you saw it happen?