Let's resurrect this thread, shall we? I just got my new iMac last weekend. I'm trying to figure out if I'm seeing any yellowing or not. Sometimes I'll stare at my 24" (solid color backgrounds) and sometimes I think there are some slight gradients in colors.. specifically yellowish, but then when I give it another look I think they aren't there. But then I look again and I think they're there. I'm just having a hard time figuring out if it's one of those "all in your head" things or if something is actually wrong. Any further reports of this at all?