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Same problem here.. it just won't play from my computer to my new Apple TV... I can't believe this.
 
Yep.. Same here..

I wanted to watch it on the new Apple TV while installing iLife '11 on my MB Pro to play around a bit. Guess I will just hook the MB Pro to the TV and watch it that way, but seriously, what gives with that?

[UPDATE]
i Just re-encoded the video with VideoMonkey and its fine now. I used the Apple TV setting.
 
It crashes/reboots my first-gen Apple TV every time I try to play the podcast of today's event. No such issues with any other media or podcasts (last month's event podcast works fine).
 
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