I've got Spotify for Linux installed and for some reason I was getting duplicated notifications for song changes (different text as well). Now one of them is very bad, as it just shows the song title. The second one comes from spotify-notify (which I installed myself). I've been trying to figure out what program sends this other notification but to no avail. Is there a way to identify this program?
The newest Spotify release has inbuilt notifications. You don't need
spotify-notifyanymore.