Since I upgraded to ML yesterday my fan is spinning almost constantly often at over 4,000 RPM when my MBP on Lion was totally silent. It's unusually warm here right now (28C/82F) , but the fan noise started with the upgrade. Does anyone else experience this? My CPU temp is at 65C/150F almost all the time when the system is idle. Spotlight indexing is not running, and I don't have any other CPU-intensive programs running.