You'll find your whole libary wiped clean.
Yep how'd you know? You on the Apple iTunes team? I had 2 playlists on iPhone one pretty good size. And yep the sync finally processed but when finished I had zero play lists. Yeah it deleted them both from the iPhone and iTunes. The one was a compilation from years. At least I was only syncing 2 of my playlists I have in iTunes otherwise I guess they all would have been deleted. What a POS iTunes has become. I never had issues until ver 11 then its been one thing after another. Guess I got work to do recreating a friggin playlist or two. Ver 11.1.2 would only work in manual mode. Was hoping this update would resolve those issues. Guess not.