Got my new 2012 iMac a few hours ago and have finally gotten to trying air play mirroring. For some reason, any full-screen video content stutters and freezes on my Apple TV (version 2). I'm outputting with the setting optimized for my ATV so I can't help but wonder if this is due to the slower processor in the ATV2? Have others had this experience? I'd like to know what I can do to fix this (or if I simply need to buy a 3rd gen ATV)?