I get this exception when running telepathy-butterfly git and papyon 0.4.2-1ubuntu2

PythonArgs: ['/usr/lib/telepathy/telepathy-butterfly']
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.6/papyon/switchboard_manager.py", line 348, in _sb_message_received
     handler._on_message_received(message)
   File "/usr/lib/pymodules/python2.6/papyon/conversation.py", line 368, in _on_message_received
     logger.debug(parts)
   File "/usr/lib/python2.6/logging/__init__.py", line 1038, in debug
     self._log(DEBUG, msg, args, **kwargs)
   File "/usr/lib/python2.6/logging/__init__.py", line 1167, in _log
     self.handle(record)
   File "/usr/lib/python2.6/logging/__init__.py", line 1177, in handle
     self.callHandlers(record)
   File "/usr/lib/python2.6/logging/__init__.py", line 1214, in callHandlers
     hdlr.handle(record)
   File "/usr/lib/python2.6/logging/__init__.py", line 675, in handle
     self.emit(record)
   File "/usr/lib/python2.6/dist-packages/telepathy/server/debug.py", line 76, in emit
     self.add_message(record.created, name, level, record.msg)
   File "/usr/lib/python2.6/dist-packages/telepathy/server/debug.py", line 69, in add_message
     self.NewDebugMessage(timestamp, name, level, msg)
   File "/usr/lib/pymodules/python2.6/dbus/decorators.py", line 309, in emit_signal
     message.append(signature=signature, *args)
 TypeError: Expected a string or unicode object