This only happened today, but it happened two times. When it does, the machine locks up. I think the logic board might be bad based on what I've been able to research on the matter, but I don't know if this was just in passing or will it get worse? If I do have to send it in, I should have it covered thanks to apple's logic board care program, but it'll be a pain in the ass since I'm using it so heavily right now for my ad work. http://www.apple.com/support/ibook/faq/ Anyone have an answer?