[hdmkv]

Okay, I've got great news! ... I got 3D to work. Enabled 3D under XBMC's Settings > Videos > Blu-rays as I had done before, but this time I connected via HDMI directly (bypassing AVR) to my BenQ W1070 PJ and a little later to LG 55LM4600 3D HDTV in another room. 3D worked on both displays (one's a passive, other's an active) !

I then tried via another AVR, a Pioneer VSX-822 (only 5.1, but hd audio capable), and it also worked! So, I went back to my main home theater AVR, the Denon 1913, and even tried a couple different HDMI cables, and same result as before, either top/bottom effect for frame-packed 3D (if 3D enabled in XBMC) or only 2D (if 3D disabled in XBMC).

So, VidOn doesn't like my Denon 1913. It's weird because both my Mede8er 600X3D and Intel NUC HTPC w/PowerDVD play 3D fine when hooked up to PJ via this receiver.

Anyway, 3D looks fantastic on VidOn... as good as my Mede8er 600X3D and HTPC. The only problem is VidOn has no way to do left/right eye swaps. The latest Tom Cruise 3D BD 'Edge of Tomorrow' uses right-eye first (unlike left-eye for most 3D BD's), so I had to use my LG HDTV's and BenQ PJ's remotes to manually swap left/right. Then, 3D looked correct. VidOn needs to implement a function via its remote or UI (after starting movie) to allow left/right swaps easily.

Anyway Wolly, it seems VidOn box is a little fussy with some AVR's. This could be why other users in your forum are either not getting 3D or not getting hd audio. Bottom line, these issues should be solvable. Hope my tests helped, but if you still want a debug log for my Denon AVR set-up not doing 3D, let me know. I'm confident enough in your devs abilities given what I've seen so far, which is very impressive for a cheap Android box, that I'm ready to buy another box .