Hey, I first had the amazing A018 screen but my computer would creak so I got the screen replaced and ended up with 3 A020 screens following. The first was uneven so I got it replaced then after that I ended up with a screen which was a little warm but the service center scratched it so I got it replaced again and then finally the screen I have now. I haven't compared it with another screen but the google bar and typically the #f1f1f1 color seems to be yellowish grey, the color changes with the angle of the display, except for that the screen seems to be fine. I tried calibrating it with the inbuilt calibrator but no help! That yellowish greyness is driving me nuts!!!! Except for that the screen seems to be fine. Any Suggestions? I don't have genius bars but only authorized service centers and the Apple Care in my country is rude and they don't understand anything and they have already replaced it thrice before and all the three displays were similar!