iMac ATI 4850 Crashes and Graphics Problems (glitches)

So, I am not starting to see problems with, what I think, is the ATI drivers for the ATI 4850 in the new iMacs. Look at the picture upper left in this post here and look at the upper right corner. See that greenish line, it isn't part of the image. That picture is part of a screen shot taken from within Aperture 2. I have seen that with other images, If I exit and come back into Aperture it is gone. The line moves around too and grows and shrinks in size for different pictures. I am also seeing crashes and freezes....

I am also seeing crashes and freezes in OSX now. I was using Aperture and had moved to a new picture when the whole system just froze. No response from anything. I had to power off the iMac and power back on to recover. I, again, am seeing more crashes in boot camp, this time in Fallout 3, had to reboot.

OSX 10.5.7 is due at "any time now(TM)". Lets hope they roll out new ATI drivers for both OSX and boot camp.  Here is a picture of the full aperture session.