Grr, this happened with my 17" iMac and now it's happened with my MacBook. As you can see from the YouTube video here, a bug has conveniently made its way under my screen! It's still crawling as I write this, just hoping that it dies off-screen and if it doesn't, I'm hoping AppleCare will cover it! Anyone got any ideas?? xxx *edit* argh! it's died on screen!!! oh well, phoned up apple and it should be covered by applecare!