I have tried everything here and and I am sorry to report no lasting success. Home sharing is just simply not working across any of my devices - 2x iPad (3rd & 4th generation), iPhone 5 & Apple TV (3rd generation), MacBook Pro (mid- 2010), Mac Mini (late 2012) and ancient, little used PC with Windows 7. All this supported by an AirPort Extreme, multiple Airport Express connections and a network the that's served we'll in the past. All devices are slap bang up to date with OS, patches, upgrades and, tellingly where appropriate, iTunes 11. While I have no doubt that whatever the issue is, and I can't see it being my home network since nothing has changed, it will be fixed I am just so disappointed.
When people ask me why I converted to Apple 3 years ago it has always been easy to say "it just works" because mostly it did just that. Now I find that the key features of the whole network and the array of Apple devices, largely to consume my extensive media collection at leisure, in any room of my choice, just does not work reliably. At best I get 10 minutes of music before it drops out, video is unreliable and, much worse, without signing in and out of home sharing the information delivered to each iOS device is just rubbish, 3 artists with wrong identification, about 20 albums equally badly labelled and only a few hundred 'songs' - this out of a collection of several hundred ripped CDs all present in iTunes Match and countless purchases.
As for the proclaimed advantages of iTunes 11 and deeper integration with iCloud - no evidence of that here. TV programmes and Movies shift from 'Watched' to 'Unwatched' across devices and at random, a 10 track download on the base machine (Mac Mini) shows only 3 on one iPad, 4 on another and 6 on the iPhone.
My biggest complaint? That I have been let down & very badly by sloppy delivery - Maps was bad enough but the reasons for going early made sense and the alternatives get me by. iTunes and home-sharing is a the core of how I use my kit and if that doesn't work I don't know why I bother.
I have high hopes of the much touted fix release, I know I should perhaps have waited until it settled before committing to iTunes 11 but this really has to stop. Before you can 'dumb down' all of this so it is a consumer no-brainer it has to work.
If anyone finds a resolution that does not involve fiddling with firewalls on my router, signing out and back in, switching off and on again or performing some mysterious rain dance (I mean Terminal) I would be interested. I would be much more interested in hearing Apple saying "Sorry we screwed up, we know it is broke, we will fix it in x days time" - not too much to hope for is it?