Ok, here is another one to add to the list of people having problems with their iMac's graphics. I have a 20" ALU iMac. I have my iMac set to do a photo transition screensaver from my iPhoto library. It does this fine but I will be playing the 360 and look over and I see graphical lines everywhere. It looks as if a game froze on the original Nintendo, with purple and pink lines everywhere. When I move the mouse it all goes away. But it comes up again after showing the slideshow for about 5 minutes.
What could this be? Why is it doing this?
What could this be? Why is it doing this?