My ageing MacBook is regularly kernel panicking when I stream video from anywhere but YouTube. That's the only time it does it. 2gigs RAM which memtest says is fine; recently shifted to new user accounts to get rid of any crap; done an archive and reinstall. Done some googling of it, but can't find anything germaine. So now my best last hope is a clean install. Any advice? Or does it sound like a hardware issue?