Okay so my wife has been having an issue with her base 13" MBA. When she tries to restart it, it will close all the programs, the dock and taskbar will go away and it will just sit there with the wallpaper up and the rainbow wheel going forever. Sometimes it will go to the blue/gray screen, but I have yet to see it actually restart on its own. We can turn it off and turn it back on by holding the power key and then everything seems fine until you try to restart it again. Any thoughts???