I think I am having this problem with this driver. Although it seems like a much fast driver over the 266.66 for my EVGA GTX560Ti card, it auto minimizes 3d games to the task bar (this beta driver does). I am overclocking my card and have had it using EVGA precision stable at 950/2150 but now it seems as though it wants to crash games at that level. I dunno. I want to like the speed of this driver but its maybe making my OC unstable.