Hi, I’ve had the same problem with my AppleTV & finally got tired of rebooting the thing & found your blog. This seems to be related to HDMI signal synchronisation, and I’m thinking it might actually be caused by it failing to sync correctly if the TV is not at its native resolution.
I’ve had my res set to 720p & had this problem… but the TV’s native res is 480p (its a cheapie plasma). So I’ve just set mine down to 480p & was wondering if perhaps your TV’s native res is 720p.
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