itunes playlist tab missing
I was shocked to see my playlist tab was missing today, and all playlists invisible. I did notice that the playlists on my mobile device show up on the side though.
Your playlists on your left sidebar are not your mobile ones, they are your iTunes ones. Put your mouse on it, and click "show". If you want Playlists showing on the top bar again, click View >> Hide Sidebar; assuming you're running iTunes 11 based on the screen shot.