Hi everybody,
This looks as a video driver problem. I have a Vista machine and at first point I had low framerates when running the game. I then installed the latest drivers of my Nvidia card and got the same problem as seen on the screenshots above.
The solution is: install the latest Bèta-drivers of Nvidia.
I can play now GRAW in highest details with high framerates and without the problems mentioned above.
Try it.
Good luck !
Geert.