Managed to get it fixed on my ipad.
I just had the same problem where I could see the shared library in my ipad, but everything was blank.
After an hour or more with Apple Support it was fixed by connecting ipad to itunes via cable. In summary uncheck sync over wifi. Apply the change and then sync.
Virtually immediately the shared library items appeared in the ipad library.
It seems to be a problem with sync over wifi and home sharing being mutually exclusive.
Great well tested software this apple stuff isn't it .....
Hope it helps you