I've been experiencing Kernel Panics on a random basis on my Macintosh for a couple months. It would panic, (then I'd panic), and it would give me grief for an hour or so as it doesn't want to start up, then, finally, it would start up fine and not give me any more trouble for a couple weeks.

I finally brought it to an Apple store last week. They determined that it was bad ram.


Food for thought.