Back in January, I went through THREE 27-inch models (two i5s and one i7). They all had yellow screens. I decided with this update I'd try the $1499 21.5 inch model, refreshed models, plus *different* screen size. Surely I'd have no issue? The computer arrived today from Amazon. Nope, immediately noticed bottom 1/4 of screen and ENTIRE right side of the screen has the yellow/dirty cast. I keep iTunes on the right side of my screen, and the white from it looks awful, yellow. Open macrumors full screen, and you notice the beautiful display in the upper left quadrant, and the very nasty color of the rest the display. How can Apple keep pumping out these machines with bad displays? The real shame? This computer is *FAST*. Core i3 may sound low end, but it's mega quick. It's physically gorgeous too, and this size fits so much better on my desk. However, I am not going to look at a yellow screen each day. Sadly, I wil return it immediately to Amazon (thank goodness I didn't use migration assistant and would then have to wipe the drive). I will try the next revision, or wait until I can afford a Mac Pro and a professional display of some kind. For now, I'll continue with my older Core 2 Duo iMac (still very competent) with a second cinema display attached to it for extra real estate. A true shame. In my opinion, these yellow iMacs should be making the news, NOT the iPhone 4, which works great for me.