After upgrading to Lion on my 2010 11", when running full screen apps I noticed that there's a slightly dark shadow running across the entire bottom edge of my screen. It almost looks like a border, and I'm not sure if it's meant to be that way or if it's just that the backlight is darker there. I never noticed this before, but I'm thinking this was because I leave the dock unhidden on the bottom. I'm curious if anyone else has this, or if I'm just being a little too OCD, which is entirely possible!