There are two problems with passing Frame Packed 3D (the type output by 3D Blu-Ray players) through your receiver... one is related to HDMI 1.3 vs. 1.4, and the other is not... neither is related to bandwidth (as can be the case with HDMI cables).
1.) The audio signal on a Frame Packed 3D output is in a different place than a standard 2D output... HDMI 1.3 receivers don't know where to look for the audio signal.
2.) Your particular AVR has video processing that, even when "disabled" is still active and interacting with the image being passed through. Each 60hz frame of a Frame Packed 3D output is made up of two full-resolution images (i.e. left eye and right eye, stacked one on top of the other with a black line separating them, totaling a frame size of 1920 x 2205. The video processing in your AVR can not handle output of this frame size/resolution as it is not a standard resolution it recognizes.
If you were able to completely disable/bypass your AVRs video processing (some AVRs can, yours can not), basically turning it into a electro-mechanical HDMI switch, you might be able to pass a Frame Packed 3D signal through to your display. You would still need a secondary cable connection (Optical or Digital Coax) for audio and, as such, you would lose the ability to pass bit-stream TrueHD and DTS-HD Master as well as Multichannel LPCM to the AVR, defaulting to core DTS and/or re-encoded DD.
None of the above applies to Side-by-Side and Top-Bottom 3D formats, since they pack both left and right eye into the standard 1080p/1080i/720p frame, but this results in some loss of resolution when processed into full left/right eye frames by the display. SBS and TB streams are HDMI 1.3 compliant in all ways including audio. It's quite likely this is the method your friend is using, whether it's 3D from a PC, broadcast source (Cable, Satellite, etc), or Panasonic Blu-Ray player.
I'm currently passing SBS through my Onkyo NR1007 (which has the same HDMI 1.3 and video processing limitations as your SR806) from a Panasonic BD player with no problems... my motivation is different (long in-wall/ceiling HDMI cable not capable of passing frame-packed 3D), but the implementation is the same. It's a completely workable solution if you can't manage another workaround (separate HDMI switch and Optical/Coax for audio). You will need a Panasonic BD player to do so with BD discs as they are the only brand with SBS output... you can get the BDT220 refurbished from CowBoom right now for $60 + 15% off with the coupon code "Celebrate15" (came out to $55 shipped with tax for me).