While playing a video "on air" the video on the second screen is noticeably choppy - not enough to make it unwatchable, but enough to be quite noticeable.
i'm on a dual core (1.9Ghz) windows 7 laptop, with 4gb of ram. I've also noticed this on the mac client, on a dual core leopard iMac.
As a workaround, Is there a way to disable playback of the video on the main screen (so the video isn't being driven twice)? I would think this would at least help the performance somewhat...
The problem occurs with videos of varying qualities (there doesn't appear to be any difference between running a 720p video and a 320p video... seemingly the same amount of frame drops)