Hello, I am new here and my english does not quite good. I just buy the new iMAC 21.5 mid 2011. It's very fantastic PC for me and OSX is very cool. But I read the thread about how to check yellow tint with grey bars. I found my bottom half of my screen is slightly has yellow. Notice by a bit yellow grey bar. But when I move back far from screen and see with different angel. The tint gone. So I call my wife to come to sit and check for me (My wife has no knowledge about this) and then she said "Nothing yellow, The color is look good". Some people tell about yellow tint must be notice in all angle of view and brightness. Then I try to test tint my Dell LCD and I see the tint too. I never test this LCD before (4 Years now and it's look perfect). How do you think about this? Optical effect or real Yellow tint?