I performed a clean install of 10.8 which was kept up to date as of yesterday at 10.8.1. Battery life was terrible as it was with lion, but now the computer temperatures are crazy. Doing very little the temps are between 70-89 degrees celsius on a regular basis. I don't know if this is apples attempt at ruining older hardware to get users to upgrade, but if not this is terrible engineering. I just reinstalled Snow Leopard and temperatures are maxing out performing the same tasks as mountain lion at 60 degrees. Is anyone else with MBPs having these kind of extreme heat issues? I have at mid 2010 macbook pro.