My CPU is currently hovering around 70-75C, and my fans are working pretty hard to keep it at that (4000 RPM). Though at the moment I'm doing minimal web browsing and some very light programming. I'm using Eclipse to run some basic Java code (takes a fraction of a second for the code to run). It's sitting on a flat wooden table. No I don't have any huge processes running invisibly - my CPU is only around 2-4% utilisation. When I run something very intensive, e.g. a Geekbench stress test, the temps are only around 90C, so that's normal. This has happened before, but only in the past week whereas I've had this for months. I doubt this is how it should be, I'm wondering if any of the CPU thermal paste or fan has been shifted, as I carry my MBA everywhere with me. It's a 2011 refurbished.