I'm using Spotify version 18.104.22.1683.g6ea1e7f6 on a windows 7 laptop. It looked like it updated this morning when I started it. Now, no matter which playlist I'm in when I select a song to play it plays the first song in the playlist. When the first song is finished it goes to the next as it should. The shuffle feature also works and I can skip forward and back. The problem is that no matter which song I select to play it plays the first song in the list, unless shuffle is on and then no matter which song I select to play it plays a different one. Thanks for any help.
I just went to the Spotify Mac download again and downloaded it. I installed it again without deleting the one I already had and it fixed it. I don't know if it helps to have Spotify running while the other download is installing but it worked for me. Hopefully it fixes your guy's problems too 🙂