Constant rebuffering stream interruptions since 12.1.2.27 upgrade
Home sharing appears broken since I upgraded to iTunes 12.1.2.27. An old XP desktop manages my large Library, although the actual iTunes media folder is on an external hard drive. I generally share to a Windows 7 laptop in another room and to an iPad. Since loading 12.1.2.27 on both Windows computers, I rarely get to listen to a whole song before the sound stops and a Window pops up on the laptop titled "Opening URL" with the content "Rebuffering Stream". If I don't click stop, this Window will persist forever. (By the way, when this Window was up, I couldn't navigate to this site - once it was closed, no problem). On clicking close, sometimes when I hit the play button again in iTunes, I restart the interrupted song. Other times, a Window pops up saying Opening URL, but not Rebuffering Stream. If I click stop on that window, generally the shuffle play list is regenerated with different songs, but again, the rebuffering stream window is very quick to return.
The Music player on the (latest iOS) iPad (which has no local content other than the unwelcome U2 album) is a little more robust, but is also (even more than usually), subject to sudden losses of audio, paging quickly through the songs on shuffle play without playing any of them, displaying the play or pause button randomly without a relationship to whether the song listed is paused or playing, and requiring the sometimes 20 to 30 minute process of reacquiring my shared library. Again, it's a big library, > 230 GB.
iPad 2, Windows 7