Hello,
I am using an Nvidia 8800 gts 512 mb for my laptop.
Well, everything's ok now. I downloaded Nvidia Nhancer utility while researching this other 'white specks/artifacts on the horizon bug' and now I'm able to use anti aliasing without a problem. The ingame AA bugs out on me but Nhancer doesnt.
I can just ignore this missing textures and graphics w/ shift + page up.