I'm a recent convert back to Mac. I picked up my 15 inch MBP a month ago and am running Leopard. It is set to have a dimmed display while disconnected from the wall to conserve battery power. It also dims a bit more right before sleeping. It does both of those things. It also seems to randomly fluctuate screen (and keyboard) brightness only while running on battery power. Is this supposed to be fun? Or a Leopard quirk that they'll likely iron out? Anyone else experiencing the same thing?