[looun]

Best guess is they're playing it back at 24Hz by speeding up playback then. This should cause audio sync issues when bitstreaming, especially over the course of a 2 hour movie though.

Could be a right answer.
I didn't hear any audio sync issues,i will do more attention.
tThe problem also is that himedia player app don't have debug info like dvd player,so it's very hard to understand.
All test are personal impression, i try to compare with 1 year PCH a-400 usage.