Well now it's happening to me too. Only when I open a new program. For example, if I open Firefox, the screen flashes black, once, twice, and then back to the monitor screen. Same thing with Steam... although some other programs like Thunderbird do not cause the issue.
Had been using the 285 driver with no problems and then all of a sudden I started having this. Upgraded to the 296.16 link provided here and I still get the same problems at the same points.
No other problems cause any issues and once those programs mentioned above are opened, I don't have any issues at all. It's just during opening and closing... which gets rather annoying.
UPDATE: Nevermind. I fixed the issue by doing a CLEAN installation with the nVidia beta 301.24 driver.