If you really want to see it, look at it from the top down with the screen facing away from you. You'll notice that the top edge is a different color from the rest of the magnesium case, because it's actually made of plastic. This plastic portion has a slight curve to it toward the center; you'll see the screen protruding a tiny bit as the curve becomes more pronounced. If you run your finger along the edge of the screen at the top, it'll become just the tiniest bit rough as you move to the center, and smooth along the edge (where it's flush with the magnesium portion of the case).I don't see it
I expanded the pic but still don't see what you are referring to.
Guess I just don't understand because other people say they see it.
I'm only going into this to describe how it's designed and built, not because it's a problem.