I had my display replaced on a 2011 Air 13 inch a few months ago under warranty because of a pencil lead sized light blob. I just noticed another one today. The Air is great, but these screens are total junk. I think I'll sell while it's still under warranty and go with the Pro next time. I always carry this thing around but I'm careful with it. I think the displays are defective on a lot of these machines. I'm bummed out about it, but at least it's still under warranty.