I know it's a little early to ask, but I'm wondering if anyone has had issues with images getting burned into their iMac screen. I'm thinking of buying a new iMac (my 2006 C2D is showing it's age lately) and would like to use it as a media device, too, by hooking it up to my projector. However, since I'm reading there's no way to turn off the built-in display when using an external display with the iMacs, I'm worried that leaving the screen on for hours on end while the family watches movies or TV shows on our projector will hurt the built-in screen since it'll be sitting on an in-active desktop image. Does anyone have any experience with this kind of situation? If so, am I just being too paranoid about the situation and this isn't an issue with the newer displays? I remember with the 24" displays that some of them had problems with image ghosting and/or burns. Also, is there any kind of solution you can recommend to help me remedy the problem? I think I've seen that people put a black background on their iMacs and dim the monitor as much as they can to get around this... does this work well? For the record, my family prefers to use iTunes and Firefox (online content) over Plex (which I think can black out the internal display?), Boxee, and XMBC. They prefer the straightforwardness of iTunes and Firefox, what more can I say? This preference isn't debatable, so please don't bother I'd rather use Plex tbh. Thanks in advance for your time and advice!