Over the past week or so, the screen on my iBook has stayed dim when I have woken the computer up from sleep. I can just barely make out enough to maneuver over and put it back to sleep from the Apple Menu and then wake it up again. Sometimes that fixes things, sometimes it doesn't.
Poked around on the Apple support site and found nothing helpful so I went the Apple Discussions boards and found this thread and a couple others like it. Looks like I am not the only one with the problem. I got the extended warranty when I bought the computer, but I'll have to send it away to get it fixed and I'd rather wait until the semester is over before I am without a computer to work on at home.