Take a look at what I've been experiencing. I took this photo with my iPhone, so while it may appear that there are gradation issues or other irregularities, my real concern is the top center of the image. I've had my 24in iMac for about 8 months and this issue began about two months after purchasing it, but since I work at home and am on this computer all day, every day, I haven't haven't been able to afford the time to get it fixed. This blotch is NOT on the glass and it almost doesn't make sense to call it a "blotch" since you can clearly see some kind of patterning going on. It's the LCD itself. In the corners you can see some streaking going on which IS on the glass, but the stuff at center top is not. It seems to be getting worse, so I'm going to have to take it in, but I just wanted to know if anyone out there had anything similar going on. I am.....shall we say, nonplussed about this and have been since it started.