I received a new MBP for Christmas. It's a great machine, and I am really liking Mac so far. I did a reinstall on the OS after about a day of use. I thought it would be a good way to become familiar with the system, as I had been watching all the apple.com tutorial videos trying to become an expert. Everything seems fine after the reinstall. I deleted the partition, installed the OS/apps, let the updates run, and then renamed the hard drive back to Macintosh HD. I noticed two things since reinstalling. #1) Videos seem to load slower (apple tutorials) #2) They no longer auto-play like they originally did before the reinstall. Also... I watched an entire HD stream of South Park with no stuttering prior to the reinstall. Now, I can't even get through 30secs of low quality without buffering. I checked on my PC, and none of these issues are happening so it's not an internet thing. How can I fix/change this?