I currently own a 2006 Macbook Pro 1.1, and since some months I have recurrent problems of displays bug or artifacts. I searched quickly around to see that a lot of other users on Mac (iMac or Macbook Pro) also have the same problem due to a problem for the X1600 video card. Apparently it's due to overheating problem, in my case even without warming a lot I have very bad display bugs such as colorful pixel lines, or glitches, and freeze and crash, all of this on Tiger, Leopard and Snow Leopard.
I found this interesting article here talking about this problem and trying to gather people so that Apple take the serious GPU problem in consideration.
In one of the comments, an user said he removed all bundle named with "radeon" and then he had no more problems under Leopard, and seems ot work fine well too on Snow Leopard. I did the same thing, I removed the bundles of the driver, restart, and no more problems, but not more 3D acceleration, which is not an acceptable solution.
For those interested, here is the list of files to be deleted to stop having this problem.
/System/Library/Extensions/ATIRadeonX1000.kext /System/Library/Extensions/ATIRadeonX1000GA.plugin /System/Library/Extensions/ATIRadeonX1000GLDriver.bundle /System/Library/Extensions/ATIRadeonX1000VADriver.bundle /System/Library/Extensions/ATIRadeonX2000.kext /System/Library/Extensions/ATIRadeonX2000GA.plugin /System/Library/Extensions/ATIRadeonX2000GLDriver.bundle /System/Library/Extensions/ATIRadeonX2000VADriver.bundle
I would like to know if there is a way to fix this using other drivers if that's possible or by creating a group to force Apple to make a replacement program in place.
Edit : How to locate those files on your hard drive if you are not under Snow Tiger :
sudo find / -iname "*radeon*"