I've noticed something really annoying with my RMBP. Sometimes when I close the lid, it doesn't go to sleep. I can tell because the Apple logo is still lit up. I've tried letting it sit a few seconds to see what happens, but instead of eventually going to sleep, the fans turn on full blast and the bottom gets very hot. Every time this happens, I have to open it back up (the screen is just a black screen with the cursor) and use the physical power button to shut it off. This happens maybe 30% of the time. It isn't a huge deal, but it's worrying to me what would happen if I didn't notice that it didn't go to sleep. Couldn't the internals get fried? it's also pretty annoying having an issue like this on a $2000+ laptop. Is this a software or hardware issue? I'm on the latest version of ML. Is it worth taking it to Apple/getting a replacement?