I didn't notice my yellow screen until coming here and reading about it. Luckily I had no issues I could actually spot on my own. The yellow didn't really bother me (I used to work as a photo processing tech and actually preferred my photos with a little extra yellow, so it looks almost good to me) until I noticed that after opening my comp from sleep it would show the screen for a moment without the yellow tint, and a second later the regular screen color was back. I started noticing that I thought it looked better before the yellow washed over it. Plus, you never really notice yellow until you see it change from not yellow to yellow. However, I did made a custom profile with the extra options (five different screens with bars you move until the apple blends in to the background) and it looks amazing now. My yellow problem was not at all hardware related and resolved with a simple change of color profile.