I have a mid-2011 MB Air, and whenever I use it for too long, I get some of the absolute worst migraines. I used to have a late 2008 MB (aluminum, not Pro) and I never had this problem. If I did, it wasn't that often. I can use other computers just fine, but my laptop is just torture sometimes. (My iPad and phone are fine, too.) Does anyone else get this? Is there something special about the screen that doesn't apply to others? I've turned brightness down, so it's not that.