I have an MSI Ti4600, and am using what I find the most reliable Nvidia drivers for this card which is, 5x.xx. This works on all my games.

When using the forceware drivers above that, 66.93, I get graphics corruption and a flickering display in GTA3. When using the beta version, 67.02, I get your problem, with the flickering white display in Warcraft III. All my other games work fine though.

Is there a place to report these bugs to Nvidia?