I have a TX-NR616, which I bought two weeks ago and I'm about to return it. Not just because of the issues (outlined below), but because of the complete lack of interest shown by Onkyo in fixing the issues! As you will see, we're not talking about obscure problems, but basic operations like HDMI out and even turning the box on with the remote!
These are the main problems I've found so far...
1. Unit will not turn on with remote unless in Network Standby mode.
2. HDMI fails on starting up and the unit has to be re-initialized or reset to operate.
3. Spotify fails to log in even when the user name and password are confirmed correct.
4. Music will not stream over DLNA 1.5 using an Android phone.
If you have experienced any of these issues or, indeed, anything not mentioned, let us know here. At least we'll be performing a public service and steering people away from a potentially bad situation!