Well, its happened three times this week, and never before. I will open my new macbook, turn it on, and guess what!? i am greeted with that green light next to the isight. i have no idea why its on, the macbook as just booted, and i dont know how to get it to shut off. It works fine normally, but when it turns on at start up, all i get is a green screen on my photobooth if i open that.... What do i do?