I was editing a photo in Photoshop 7 when the screen of my 24" 2.8 turned into what looked like a Windoz 3.1 screen with a dithered, pixelated 256 color GIF pallete. I did a Grab of the screen then opened the display preferences panel and tried different resolutions and profiles; no change. I closed and restarted and it returned to normal. When I opened the Grab I did it too looked normal. So something in the driver / processor for the screen must be buggy. If it happens again I'll take a shot with my camera. I checked the temps with temp monitor and the highest for the graphics processor were below 140 F which is about where they have been. The power supply sensor has been running around 158 F. Also video related I encounter stutter / strobing if a image in Canon Digital Photo Professional when dragging it within the edit window at 200% How does one go about reporting a problem like this to Apple?