I've had my 2011 baseline MBA 13" since launch and recently it started doing something weird. It had never done this before, but now when sometimes when I leave it plugged, shut and sleeping it gets warm. Nothing is running since it is sleeping so I do not know what it would be getting warm. The only thing that is really happening is the battery is charging, but this didn't happen in the past when it was sleeping and charging so I am not sure that is it. It's isn't that it is warm right when I close it, but it will still be warm 2 hours after I walk away. Any help would be great.