I have been reading, theeres a post in insanelymac about the divide by zero crashes on Tiger, it was because the HTT recognition in the kernel, they had to mod some hex parameters to get it working and suppostly it worked flawlesly, what do you think? It has something to do with the kernel recognizing 2 cpu's instead of 2 cores, or something like that.

http://forum.insanelymac.com/index.php?showtopic=24907&hl=divide

What do you think?? hope it helps! ^^