It never even occurred to me that signing in and asking a quesiton would generate a question! I just want to get my BD backups playing on my Xbox.
The 2004 join date is a good point. I was working on media center back in 2004, AVSforum was a natural place to hang out.
Honestly, I think AVSForum is more likely to give me a good answer than me trying to hunt down the right person at MS. Yes of course people at MS will know, but I was betting there's "crowd wisdom" here where somebody could just say "yeah, the latest dashboards never fixed this, so it still doesn't work" or "you need to encode to and you'll be fine" or "just don't try do it over the HDMI cable".
thanks again if anyone has info on this. (But I'm guessing maybe you folks don't since nobody has answered.)