Just got a new Mac Mini and hooked it up to my receiver.
Unpleasant surprise - most multi channel MKV files are messed up - center channel plays from my left surround for sure, not sure where everything else maps out but in general it seems like it treats my left surround as center and everything to the left and right as corresponding speakers. Would be really funny if it wasn't so annoying.
This affects only VLC and MPlayerx, iTunes plays movies with multi channel audio just fine.
Googling reveals that this particular thing popped up after the latest Lion update.
Any one else with the same problem?