Radiotray crashes on start on Ubuntu 14.10 final beta

[David Gardner]

~> radiotray
/usr/lib/python2.7/dist-packages/radiotray/AudioPlayerGStreamer.py:51: FutureWarning: The behavior of this method will change in future versions. Use specific 'len(elem)' or 'elem is not None' test instead.
  if(cfg_provider._settingExists("buffer_size")):
Sleep Timer, Stops playing after a predefined time, SleepTimerPlugin.py, Carlos Ribeiro
HelloWorld, This is a test plugin, HelloWorld.py, Carlos Ribeiro
started
Notifications, Shows message notifications on the desktop, NotificationPlugin.py, Carlos Ribeiro
Mate Media Keys, Controls Radio Tray through keyboard multimedia keys, MateMediaKeysPlugin.py, Ken
Gnome Media Keys, Controls Radio Tray through keyboard multimedia keys, GnomeMediaKeysPlugin.py, Carlos Ribeiro
History, Shows song history, HistoryPlugin.py, Carlos Ribeiro
Attempt to unlock mutex that was not locked
Aborted (core dumped)
~>

Coredump attached.