I know this is going to sound crazy, after a few days of using the MBA gen 2 for short periods of time it appears the contrast has started to change. I dont know how to explain it but if you sit in a fairly dark room in a fixed position you can see (well at last on my machine) the contrast of the machine changing from darker to lighter / then a few seconds later from lighter to darker. Now I cant say often this happens as I have only just started to notice it, and its not a huge contrast difference. in fact it ever so slight ... but its enough to drive me nuts! has anyone else had this, or noticed this?