For the past 3 consecutive days my week old Macbook keyboard and mouse freeze and lock up. This usually happens after a few hours of web browsing. The computer does not necessarily freeze, as the clock still ticks, its just that keyboard and mouse lose functionality. Is this a heat related issue? Can this be remedied via a firmware upgrade? I am running SMC version 1.13f3. I tried to install firmware 1.412 that was released this past October but OS X tells me that I don't need an update. Am I running the lastest firmware? Thanks.