Well, I fixed the home setup. I use a Linksys E3000 and had "Wi-Fi Protected Setup™ " enabled. This is supposed to just simplify adding new devices to the network but it must also affect the traffic that passes through the router. I had no need for the feature, so I turned it off and went to "Manual" and everything magically worked. Go figure.
Guess I'll attack the office network again on Monday. :/
Haven't tried this yet but I have a feeling you just solved my problems...
I just hate it when they put in these SuperAwesome(TM) "security" features and enable them by default...
A good router should be just that, a router, it shouldn't get in my way and I don't want any "value-added" features; all I want is reliability... Keep it simple, stupid!
I have been fighting this for several days and finally found the answer. My problem was that my wired PC was not visible to my wireless devices. I have 3 apple tv's and several ipads running the remote app. I tried reinstalling itunes and all its services several times, rebooting all my devices and then deauthorizing and authorizing my pc until i was blue in the face. None of this had any effect. I then tried wireing one of my apple tv's into the router instead of connecting it wireless and my pc became visable only to that apple tv. I researched a little more and then found a little note about turning off IGMP Proxy on my router. I tried this and then restarted itunes. Problem solved! Now my wired PC is now visable to all my wireless devices. I hope this helps
Disabling IGMP Proxy on my Verizon FIOS router fixed the issue for me too. I had the same oddball symptoms where a mix of wireless and wired connections couldn't see each other. I dug a bit into my router's config and found IGMP Proxy settings under the Advanced section of the config. Shortly after setting it to Disabled my home sharing files showed right up on my AppleTV.