How apparent is the yellowing for you guys? It's hardly noticeable on mine and the only way I really see it is when I pull up that black background with the two white boxes in slide show view, and even then it's hard to see unless you look really hard.
Just not sure if I should bother trying to get it exchanged. I just hope the problem doesn't get worse in the future.
Here's a picture:
http://web.mac.com/jamiemun/misc/screen03.JPG
See any yellow? If I stare at the bottom long enough I think it turns yellow... *shrug*
And another with the gray test:
http://web.mac.com/jamiemun/misc/screen04.jpg
What's weird is the edges look horrible in this picture but it doesn't appear that way in person.