I got my mac pro in March. So I've had it for a good 6 months. In that time, at least 3 times my 30" Cinema Display has shown some sort of video glitch. I'm convinced that it is the 8800, and not necessarily the Cinema Display. What happens is, out of the blue, and for reasons I'm not sure of, I will get a strange pattern of brightly illuminated pixels on the display. They are "fixed". In other words, If I move and image around on the display, those pixels are stuck and do not move with the image. Also, if I take a screenshot, they do not show up on the screenshot at all. I had to try and take a picture with my camera to show you guys. A reboot and/or logout/login fixes it. I think it is some sort of bad video RAM or something. I've already upgraded to 10.5.5 and it did it again last night. I'm pretty sure it was the result of DVD player crashing. But then again, I don't know if DVD player crashed because of a video glitch. The DVD was kind of scratched up (netflix) and the computer did have problems reading it. DVD player beach balled when I tried to skip a chapter so I have to kill it. That's when I noticed the display was all screwed up. 3 times in 6 months isn't a huge deal, but it does make me worry about a pending hardware death of either my display or video card. Anyway, have you guys seen this? Is it a cause for concern? Is my 8800 on the way out, or is it most likely some sort of driver or app hiccup that isn't really a big deal? In these picture you can see the randomly scattered light green pixels. It's almost as if a color has been swapped out.