My fan is quite noisy on the 13-inch 2011 i5 model. The laptop isn't doing anything intensive, and the fan isn't whirring fast, it's just noisy. It doesn't sound faulty. I'm currently in the process of upgrading it to the latest 2012 model 13-inch. Does anyone know if the fan is near silent / off when not doing anything intensive? Or, at least quieter. I've got used to the Air, which is completely silent, noticeably so, 99% of the time. Thanks.