Traceback (most recent call last):
  File "/usr/bin/zeitgeist-daemon", line 98, in <module>
    interface = RemoteInterface(mainloop = mainloop)
  File "/usr/share/zeitgeist/_zeitgeist/engine/remote.py", line 51, in __init__
    SingletonApplication.__init__(self)
  File "/usr/share/zeitgeist/_zeitgeist/singleton.py", line 70, in __init__
    bus = dbus.service.BusName(ZeitgeistDBusInterface.BUS_NAME, sbus, do_not_queue=True)
  File "/usr/lib/pymodules/python2.7/dbus/service.py", line 140, in __new__
    raise NameExistsException(name)
NameExistsException: Bus name already exists: org.gnome.zeitgeist.Engine