As a followup on my previous post, I was able to point my Oppo blu-ray player to the .mkv file, on the network, and the playback is superb, audio and all!

I don't know what the DIVX deal is (after all, it's the same file, in both cases), so if anyone has any ideas that might help, I'm keen to figure that out. However, the basic problem, i.e., playback in the home theater, is solved. And there may be some output processing that the Oppo is applying, because the image is stunning (maybe it was already stunning, but, you get the idea).

Thanks, a lot.

- s.west