Build 10D573. Mac OS 10.6.3 2 GHz Intel Core Duo 1.5 GB RAM Running iTunes, Adium, and Safari is about the extent of the work I do on this computer. Yet it consistently runs ridiculously hot and crashes. I also get weird lines through the screen, as you can see in the attached screen shot. It doesn't run slow. It's actually very snappy. I regularly use onyx, I've upgraded the RAM from the weak standard of 512 MB, and I even swapped the original 80 GB hard drive to a 320 GB drive. Can anyone give me any insight on what I can do to prevent this from happening?