Music does not play properly in Spotify Web Player with current ruleset enabled
Music does not play back on the Spotify web player if any rules are enabled. Disabling the rules or the entire extension fixes the problem and enables music playback.
Current guess is that the ruleset needs to be updated to accomodate the play.spotify.com site.
Please reference this thread for additional details: http://community.spotify.com/t5/Web-Player/Music-not-playing-back-on-Chrome-OS/td-p/235572