I'm jfogarty on the DUC too...
I didn't think the two monitor thing was crucial
I've got the Matrox g450
I think that my video card might not be that fast, because when i change views, I get 909x errors sometimes, but I haven't since I switched my audio drive to itself. I can definatly say that I recommend doing that...
I found someone on the DUC having the same problem with the same vid card, but they didn't mention anyway of solving it.