Hey guys, been using the 15" with 460 for about a month and a half now. Wonderful machine apart from its' quirks. Lately, it has been freezing to the point where I need to force shut down my laptop. The cursor still moves but nothing responds. I notice this happens after I sleep it and/or playing music in iTunes. Does anyone else have this issue? It just stated happening a few days ago. Everything is updated to the latest version.