Can anybody tell me if it's normal for the MBP's fans to spin much higher and more erratically when charging? It seems to behave once fully charged, but prior charging while running apps increases fan speeds significantly. I've tried many things to try fix it, pram etc but it still does it. It sometimes gets stuck at 6000rpm even after quitting any apps with nothing unusual in the activity monitor. The only way to bring the fans down is to unplug the charger, it has done this with 2 different chargers. Is this behavior normal? Thanks.