I do not have an answer, but will bump your thread for you.
FWIW, I have the same or a similar video card (MSI 6600GT), am running SUSE 10.0, and I think I am running the same driver in SUSE as you (7676), but I am not at the right machine to check at the moment. Anyway, the driver has so far worked flawlessly for 2D and 3D applications, although I am only using one monitor (admittedly this is a huge difference). Good luck toward solving your problem, though.