Hi! First: A big sorry! It was my fault: I locked the wrong surface... :S Torsten Giebl schrieb: > When you need to do pixel operations on > surfaces, don't use RLEACCEL. In my game, I need the colour-value from several pixels. So I perform only reading-operations. Should I avoid RLEACCEL in this case too? (The game reacts now as it should :)). Bye, Tim