Thank you for the update and information/link to the older driver. I wasn't having any video issues previously with the game.. until 1.03, when it refused to run in directx 11 mode because the video drivers were 'outdated'. Installing the 275.33 drivers gives pretty polygons following my group around, random crashes, stuttering, and spontaneous reboots.
It's difficult to write software that will work with all hardware - especially when it depends heavily on a certain piece such as video. Usually the software gets the blame for the problem, when it rightly belongs to the hardware manufacturer; I dealt with the same thing, except with modems, years ago (remember those?

) Who got the blame when the modem would not connect? The software they were trying to use it with, of course. So... I appreciate the effort you guys go through to help users with the different problems that come up, especially when some of those users can be.. err.. less than diplomatic.
One thing that you may want to consider is putting in an override for the your-driver-is-outdated-so-you-can't-use-directx-11 block. It would let those who were never broken to begin with, and know what they are doing with their systems, to continue to run the game as they had - and take them right back out of the users-with-problems pool. It would only help if there are a significant number of users in that boat, though..
Reading up on the NVidia forums about the 275.xx and the 270.61 driver linked above, I think I'll just go back to what I had before. The 270.61 drivers appear to have their own set of problems that I'd rather not have to deal with. Anyone interested should read up: forums.nvidia.com/index.php?showtopic=200884 - there are others, that's just the first one I read - so look around their forums a bit.