[title] is a complete joke. Perhaps I have a defective Air, but after 5 minutes of any kind of video it reduces to spitting about one measly frame per second. Any format causes this; 5 minutes of youtube, iTunes movies (lo-def FYI), random files in VLC [ad practical infinitum]... But the worst offenders are anything web-based. E.g. this gruelling 480p video: moourl.com/Narut0 . Ironically, the clip played smoother for me under Google Chrome in Parallels virtualisation - anyone else seeing this? Don't get me wrong though, I love my Air (an ageing Rev A *cry*), and think it's a fantastic machine. Just seems borderline defective in the video respect.