I went to pirate bay and downloaded v2.5, the regular 18 gb .mkv file, not one of the smaller re-codes I have seen a few places.

Opening the containing folder and playing the movie on WMP, the only sound I'm getting is the score. No dialog or sound effects. Is this a known issue, or something that I will be able to correct if I burn it and play on a blu ray player, or am I missing a (particularly important) file?

Picture looks great (that Harmy is the man goes without saying), and the movie is complete and seems to have no other issues