I picked up a 24" imac last week and after one exchange for a bad pixel, I was happy. Until I noticed a little bit of brightness gradient. From searching the web and this forum, it seemed like some had it, and some didn't (or at least didnt think they had it). Mine is actually quite minimal compared to the pictures, but is this affect considered normal for LCD's? I understand LCD's are an imperfect technology, but does a perfect display actually exist for these 24" imacs? Is a little brightness difference normal from left to right? I also have very minor backlight bleed near the top left and bottom left corners, but is only noticeable on full brightness and an all black screen in the dark. I just don't feel like going through exchanges; I did that with my macbook and it still isn't a perfect screen. Thanks.