[movie78]

This might seem like it doesn't make sense, but have a go - this might work.

In XBMC, the output of the movie seems to be the at the resolution of the actual file (as it should be - on my projector it flicks over to the 1080 24p setting and Frame Packing for my 3d Bluray Isos). However, I have no idea why, but in the settings menu if I change the resolution to something other than 1080 24p (which is the ui resolution), when I go back in to XBMC and try to play a 3d bluray iso, the file is played back in 2D (even though the resolution on the projector says 1080 24p). If I switch back to the 1080 24p setting in the main menu and then go back into XBMC, it plays back in 3d (frame packing 1080 24p)

Check to see if your UI setting is 1080 24p and if that makes it work.

The UI is set at 1080p 24p. It works with my Sony TV and when I connect the box to the Philips TV with the same setup it plays 2D only.

So I have tested another brand new high speed 0,5m HDMI cable and it still plays 2D. I also tested 1080-50p without success. The TV is a Philips 50pfl7956k and it is 3D. I have a 3D blu ray player connected which works perfect.

http://www.philips.de/c-p/50PFL7956K_02/.../ubersicht

Maybe the VidOn box is compatible with 21:9