I've discovered an interesting bug in the desktop version of Spotify in Windows 8. I've only had the chance to test it from there so far, so I don't know if this affects other OS's or not. Anyway, I've found that if I listen to music in a private session and close Spotify while in the private mode, it posts to Facebook the last track I listened to as soon as I reopen Spotify. I just spent some time testing this because I'd noticed my activity feed had some random tracks showing up from time to time. I'd say this is a fairly significant bug as it defeats the purpose of having a private session in the first place.
I'm using version 0.9.1.57.ge7405149 of Spotify.
Solved! Go to Solution.