After a pause of several months I wanted to play some SSF4 again. I never had graphic problems with it until now. For some reason certain effects (like dust moving up from player feet, fireballs, Hakan's "glow" and the screensized flash of color when going KO to an ultra-move) leave stains on my screen which stay until "wiped" by another effect or the character. I have no idea how to fix this. I changed my ingame graphics settings, nothing happened. I deactivated Catalyst AI (it's a Radeon graphics card) for the game, nothing.