coverglooobus crashes when gmusicbrowser is closed

[Ian]

Traceback (most recent call last):
  File "/usr/share/covergloobus/core/covergloobus.py", line 345, in update_time
    time = self.player.get_position()
  File "/usr/share/covergloobus/players/gmusicbrowser.py", line 133, in get_position
    return int(self.iface.GetPosition())
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)