I am not completely sure it is driver related but it did happen at the same time.
I have these weird rendering issues, notice the trees
3D resolution at 50% (to make the issue easier to spot)
3D resolution at 100%
and another one where you can see through the leaves
Specs:
ASUS P5Q Deluxe
Intel Core 2 Quad Q9550
nVidia GTX 285
Corsair Dominator 2x2GB 1066MHz DDR2
WD Caviar Black 1TB