hello, i registered today in order to find out if anyone else is having problems with youtube. i'm running the july 2011 mba 11' 4g/128g, it's amazing and i've been nothing but happy with it. yesterday though, suddenly, the computer will not load youtube videos. the strange part is, if i click on a link to a youtube video from say a blog or Facebook, it plays just fine. the problem occurs when i manually load youtube, then attempt to watch a video from the site. Any ideas? have tried restarting the computer, shutting down safari, etc. no new apps or software has been installed recently. my iPhone 4s using the same wifi connection plays youtube videos perfectly with no lag time. when on youtube if i click on a video i get a blacked out screen and pushing the play button does nothing. no page loading is going on so i feel it's not a connection issue.