I felt the need to post this because of the heartache I had with my MacPro. The problems: 1 or 2 pixel horizontal lines on active windows. Multiple green/red/blue single pixel dots (especially on black bkg) Crashing CONSTANTLY when coming back from screensaver/genie effect/expose I was constantly on edge working on the computer because it would crash 6 - 10 times a day. Picture would freeze but the mouse would move around the screen. If you are having this problem, GET YOUR VIDEO CARD REPLACED! I had to fight/convince/send screen grabs to get them to send me a card, but after explaining that I wasn't an idiot, and I wasn't making the lines up, they sent me a DIY replacement. I have an ATI XT1900 and once it was replaced the computer is PERFECT! This has renewed my feelings towards the Mac. Imagine you spent 7 grand on a computer to only have it crash constantly. Thats why I left the PC. Hope this helps someone with the same problem and frustrations. I just hope you have a warranty or applecare. The replacement (if I didnt return it) was $479!