As I have never really owned an LCD screen other then my PeeCee laptops where I didn't really care about it , I have a question. I would really like to leave the screen on (my iBook) while plugged in to show it off a little but it hints at the fact that doing so will shorten the life of the screen. Does anybody have any input they could offer on excatly how much it really hurts the screen if at all? Thanks!!