I have first played this game using my older graphics cards running SLI with 2 nvidia 7600 GT. Since then I upgraded to 2 gig ram, an amd athlon 64 x2 6400+ and 2 nvidia 8600 gt. Ever since I added those 2 new cards. Ive been experiencing these bright white light flashes in game (even in the multiplayer lobby in the background when the camera is moving across the water and landscape) it seems to only happen when I look in certian directions towards the sun or directly away from it(however I am not perfectly sure on this). Ive been dealing with it for a while but now it is severely affecting my game play as it occurs as Im about to shoot someone. The screen flashes so bright and violently I frequently have to look away because its too overwhelming. I am just glad I don't epilepsy...
btw: I am on the latest version of Arma, and I have latest graphics drivers as well.
If any more information is needed to help solve my problem please ask