I think there was something you could do with Nvidia cards... setting something to "high quality" in the video card display settings?
That's was my first intention, too but it does not help, sadly.
You can also set option for option. But finding the right option is hard, if you dont know what you looking for.
So if here is someone using a 7950GT with a newer driver, too so please post you settings ...
Finally it's absolut strange ... never happend before with any other game.
mfg