I apologize if this has been discussed recently, but it's kind of a hard topic to search for. A while back I ran across an article about a problem with iBooks completely shutting off when moved around a certain way, due to a defect. At the time I thought, "Wow, that's pretty terrible for THOSE iBook owners..." And now it's happening to mine. I have AppleCare so hopefully it will be as easy to fix as a trip to the Genius Bar, but I would like to read up on the situation if I can before I go. Does anyone know where I can find documentation about this? Thanks.