The new Nvidia driver has solved two problems for me. My Vue Preview renders sometimes turned black at the end. I also have a TV card and occasionally watch a bit of TV on my PC. The window which displayed the TV image would be Black until I moved the window around a bit.

I have Win 7, 64 Bit and a Nvidia Geforce GTX 560 Ti.

Adriaan Barel (a.k.a. Vege Mite)
"Morality, like art, means drawing a line someplace." -- Oscar Wilde