Hi, I just wiped my MBP screen as it had a couple of fingerprints on it, and noticed a weird grid thing on the top of the screen. It runs from about the top of the screen to two inches down. You can feel it with your fingernail if you run over it. Here's a picture but it's a bit more prominent in real life: (Click to enlarge) It's only noticeable when cleaning it so I'm not worried, just wondered what it was! Edit: Update from 2015 below.