I noticed this bug earlier this year on my 3 year old Macbook Pro. I tested it on a new MBP yesterday and had the same thing happen. Take a look at this image. It is white in the middle, and there are two different shades of grey on either side. I could not see both greys on either MBP. Now, press CMD+ESC to open Front Row. Then after a few seconds, press ESC to exit. Colors appear darker and I can now see both stripes. The only way to fix is to restart. Can anyone confirm this?