Re: 2.6.6 kernel breaks NVIDIA driver?
Please search this forum a bit, there are many many posts about your problem. You will at least have to solve the 4K stack problem, but there might be more issues. If you are still having problems when you are done reading, post as much information (your X configuration, logs), preferably in a new thread.
(Remember that you can save yourself some trouble by using X's nv driver, which provides decent 2d capabilities, while you wait for the updated Nvidia driver. ;-)