[HaDAk]

This may help. I enabled debugging, and snipped the log to when I started and ended the movie. In this case, Avatar.

http://pastebin.com/d2usa4qJ

It may be worth noting these lines in particular:

00:56:24 T:2853677936 M:1153114112 INFO: ffmpeg[AA17AB70]: Stream #0.1(eng): Audio: dca, 48000 Hz, 5.1, s16, 1536 kb/s

00:56:25 T:2853677936 M:1149796352 DEBUG: FactoryCodec - Audio: PassthroughFFmpeg - Failed
00:56:25 T:2853677936 M:1149415424 DEBUG: FactoryCodec - Audio: FFmpeg - Opening
00:56:25 T:2853677936 M:1149034496 DEBUG: FactoryCodec - Audio: FFmpeg - Opened

So, it looks like ffmpeg is doing the work afterall. So...why is ffmpeg not playing the center channel?