Well I was chilling in my dining room with my ibook, listening to tunes and browsing, when i'm greeted with the "you are running on reserve power message". Thinking it would be best to move to my room and plug in to the wall, I close up, and lift my lappy to put it into my backpack. I'm thinking that for some reason my ibook feels lighter than usual, then I look over to see my battery hanging out on my table still. I'm just glad I wasn't doing anything important. I tightened that sucker up real good after that. Just figured i'd share. This ever happen to anyone else?