I have the FTV box going directly to my TV via the HDMI cable. I also have the FTV box going to my receiver via optical cable for audio.
I have the same setup for my cable box. There is no connection from TV to receiver.
In the past, with other devices (Roku, WDTV) I would play some content from Netflix or Amazon prime, but would then turn my TV off - leaving me with just audio. I do this at night because I like to listen to something as I go to sleep.
With the FTV, I have noticed as soon as I change to a different content source on my TV, or if I turn off my TV, the audio from the FTV stops. Does anyone know if there is a way to get around this?