Mezzmo often seems to use around 50% of the my CPU. Not sure exactly what its doing.
The log window says "System task processing active playlists: 45 remaining"

But its said that for some time now. There's no apparent way to stop it to see if that's whats using the CPU.
Be nice if there was a window that showed progress or in more detail what exactly it was doing here. All you see is 3 dots animating.