the reason for this COULD be the following: when ALT-TABbing, DirectX loses it's device that it needs to draw, that is because an other app also uses the videocard and overwrites some of it's videomemory.
thus when you go back to the game, it's almost like restarting it but with the difference that you already got a game 'window' and I don't know how everything gets reloaded in <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> so that it causes the flashes, but all resources DO have to be reloaded and such. some games handle it better than other <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
