I have had the black screen crashes where the video card stops responding while immediately ramping up its fan to 100% before the sound starts looping in a few seconds. I'm on the Catalyst 11.10 drivers with a HD4890. However oddly enough, It would seem i only get these crashes at certain locations, specifically indoor caves with snow floors, which occur randomly when i am in those areas. I have not had the crashes anywhere else, and the game would play fine for hours in other areas. I haven't played enough yet to rule out this being a coincidence but it seems to be the case. I don't suppose anyone else has similar issues?