Those of you who are having the network issue, are you letting your DHCP server assign a dynamic IP address or setting a static address?
Granted, I've only been running my receiver for a week or so but I have not had any issues with networking. I did, however, assign a static IP address which makes sense to me to do on a piece of equipment like this. Pandora and connecting to my Win7 media server (static IP) work perfectly after numerous Standby/On cycles. I did upgrade my firmware but, obviously, that was no improvement. That's all I've done over my network and I have a feeling that's all I will ever do as the other current networking functions don't appeal to me.
I've got the receiver plugged into a D-Link DAP-1522 bridge (static IP address) which is connected to the 5 GHz radio of my Linksys E3000 running 11n only. Also connected to the DAP-1522 are my PS3, Xbox360, and Wii (static IPs). My media server is wired to the E3000.
Basically, I set-up my network such that all permanent devices are given static IP addresses. Laptops, netbooks, smart phones, tablets, etc. all get dynamic IPs from the E3000's DHCP server. This has worked well for me for a number of years.