'bzr branch' throwing an error when there is no network

Hi, I received this traceback whilst trying to branch. Possibly this is related to a duff net connection (as in no network). bzr should probably print out a net error rather than a traceback?

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 897, in run
    from_location)
  File "/usr/lib/python2.5/site-packages/bzrlib/bzrdir.py", line 773, in open_tree_or_branch
    bzrdir = klass.open(location)
  File "/usr/lib/python2.5/site-packages/bzrlib/bzrdir.py", line 650, in open
    t = get_transport(base, possible_transports=possible_transports)
  File "/usr/lib/python2.5/site-packages/bzrlib/lazy_import.py", line 125, in __call__
    return obj(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/transport/__init__.py", line 1576, in get_transport
    base = directories.dereference(base)
  File "/usr/lib/python2.5/site-packages/bzrlib/directory_service.py", line 52, in dereference
    return service().look_up(name, url)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad/lp_directory.py", line 60, in look_up
    return self._resolve(url)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad/lp_directory.py", line 76, in _resolve
    result = resolve.submit(service)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad/lp_registration.py", line 180, in submit
    self._authenticated)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad/lp_registration.py", line 145, in send_request
    result = method(*method_params)
  File "/usr/lib/python2.5/xmlrpclib.py", line 1150, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.5/xmlrpclib.py", line 1440, in __request
    verbose=self.__verbose
  File "/usr/lib/python2.5/xmlrpclib.py", line 1186, in request
    self.send_content(h, request_body)
  File "/usr/lib/python2.5/xmlrpclib.py", line 1300, in send_content
    connection.endheaders()
  File "/usr/lib/python2.5/httplib.py", line 856, in endheaders
    self._send_output()
  File "/usr/lib/python2.5/httplib.py", line 728, in _send_output
    self.send(msg)
  File "/usr/lib/python2.5/httplib.py", line 695, in send
    self.connect()
  File "/usr/lib/python2.5/httplib.py", line 1130, in connect
    sock.connect((self.host, self.port))
  File "<string>", line 1, in connect
gaierror: (-2, 'Name or service not known')

bzr 1.3.1 on python 2.5.1.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'branch', 'lp:smart']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [1.3.0]
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]