Tiger crashes in the same way as Leopard, so the OS is probably not the problem. I took the bluetooth dongle out to see if that was the culprit. Nope. I replaced the Logitech mouse with the Apple Pro Mouse. No crash yet, but I don't have a lot of faith in that solution.

The computer will lock up for no reason, but not usually when just sitting idle. If this were a PC, I could just throw parts at it until it became stable. Since it's a Mac, I have no idea what the hell to do. Are there any other suggestions? I'm basically at the end of my rope with this box. It would be a shame to trash something that looks so nice.