With the release of Spotify version 188.8.131.52.g9977a14b they seem to have broken their Applescript implementation. This means that MiniTune can't connect with Spotify and interact with it.
There is a partial fix which involves opening up the Spotify application and moving a definition file. This fixes the connection problems between Spotify and MiniTune but all tracks seem to have no artwork.
You might want to wait for Spotify to fix this or follow these steps to get a partial fix:
Hope that helps until Spotify fix this issue.
Please note that MiniTune is no longer for sale on the Mac App Store. I will continue to support it for as long as I can but you might want to consider using another Spotify Client. Thank you.Share on Twitter Share on Facebook