On my 12" PB G4 (latest revision, all updates), the brightness of my screen will... do a few things. It will randomly be a little dark so I'll press the brightness up button, and it will get completely black and then I have to put it up all the way, and other various things. Anyone have any idea what this is? I love having computers with issues. This, the lid not sitting right, latch catching 50% of the time, and harddrive making lots of noises it shouldn't. MMMM. By the way, I love how when I told the genius at the store that when I had several applications a day quitting on me for a week or so, he told me that was acceptable. I think they're literally trained to BS you.