Hi guys Recently I updated from Lion to Mountain Lion on my MBA. I did not do a clean installation but opted for "an overwrite". I did do back-ups and used Time Machine. I have no problems as such with Mountain Lion, however I have noticed that it takes longer for my MBA to turn off now. I'm not talking minutes but about ten seconds. Is that normal and something I just have to live with? I know it's not a big issue but I'm just curious. Besides that the only other thing I have noticed is that some time my App Center shows updates (the little number in the corner) that have either been installed already or isn't there.