Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/papyon/switchboard_manager.py", line 77, in <lambda>
    lambda sb, contact: self.__on_user_left(contact))
  File "/usr/lib/pymodules/python2.6/papyon/switchboard_manager.py", line 138, in __on_user_left
    self._on_contact_left(contact)
  File "/usr/lib/pymodules/python2.6/papyon/msnp2p/transport/switchboard.py", line 80, in _on_contact_left
    self.close()
  File "/usr/lib/pymodules/python2.6/papyon/msnp2p/transport/switchboard.py", line 42, in close
    BaseP2PTransport.close(self)
  File "/usr/lib/pymodules/python2.6/papyon/msnp2p/transport/base.py", line 76, in close
    self._transport_manager._unregister_transport(self)
  File "/usr/lib/pymodules/python2.6/papyon/msnp2p/transport/transport_manager.py", line 72, in _unregister_transport
    signals = self._transport_signals[transport]
KeyError: <SwitchboardP2PTransport object at 0x1d7c0f0 (papyon+msnp2p+transport+base+BaseP2PTransport at 0x1c79e80)>