For the last two days my MBP fans have been going off like crazy despite no changes in the type of usage or where I am using it. It doesn't matter what surface I"m using it on or if I'm using it on something vented. I'm doing pretty basic stuff - browsing the web, Office suite, etc. It's only been like this the past two days. Could this be a fan issue? Is it something I should take it to the Genius Bar for? The MBP is almost a year old and it's only the past two days the fans have been going off like crazy. TIA!