Home Sharing: An unexpected error occurred
The error ("An unexpected error occurred") appears while playing Movies, TV shows, and even Music (including Music Video's).
Sometimes I can bail out into the menu and restart the Movie/Music - but often the only solution is to restart the AppleTV (WITHOUT restaring iTunes). Restart is in the last option in the menu called general/settings.
After updating my AppleTV to iOS7.0.2 (11A502) I have a deja-vue of the connectivity problems experienced with 5.1: the AppleTV looses the connection to MacMini at random. Note: I have this setup for 3+ years, and I am using a 1Gbit (Giga-Bit switch) CABLE (no WiFi). It was working perefctly before, so the problem is clearly related to the iOS7 update. I had the same problems with a previous update - and for that reason I downgraded to 5.0.2; which I was using until the update to 7.0.2 without issues.
In addition to the instability; many of my personal Movie's disappeared because iTunes 11 considers these "Home Video's" (I updated to v11 in April this year); but the problem became visible on the AppleTV only in September after updating to 11A502. The solution is to change the Media Kind back to "Movie".
background on my problems with 5.1 (including links how to downgrade):
https://discussions.apple.com/thread/4460621
Article on problems with 5.2:
http://support.apple.com/kb/TS4526
How to change media kind:
https://discussions.apple.com/thread/5467259?answerId=23499347022#23499347022
Mac mini, Mac OS X (10.7.2), PEGASUS R6 peripheral