I have an 11" 2011 MBA, and lately, it's been getting really hot. All I have open right now is Safari and Activity Monitor, and iStat Menus is giving me 82 C, which I'm fairly sure isn't normal for idling temperatures. I started seeing this issue about a week ago, after I installed a Lion update. Activity Monitor is showing no runaway processes, and I'm only at about 1% usage right now (processor). Could a software update actually cause such a drastic increase in temperatures without increasing any process load? Edit: I'd like to add that a restart usually fixes the issue temporarily. I've also done many SMC and PRAM resets, which also only show temporary effects.