I've been having problems with my display using Windows Vista Business.
I sometimes get horizontal black lines across the screen (eizo CE210). My VGA card is a Nvidia 7600GT with double DVI port.
I have tried to solve the problem by updating and rolling back drivers, but that doesn't slove the problem. When I boot in XP everything works fine, so it must be a Vista problem. I didn't had the problem from the start, it started only after a few months.
No Eizo display drivers available for Vista.