I've had the new MBP i5 13" a couple of months now and I've only really heard the fan really make a row today while it was securely deleting about 61 items in trash, Typically would that do it? It wasn't a big job maybe 3 minutes or so, but I've done more intense stuff on it I think and it just has the usual noise in background but this was a big kick in tonight. A sign of anything or..?