TooManyConcurrentRequests error when committing

Traceback (most recent call last):
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 842, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 1037, in run_bzr
    ret = run(*run_argv)
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 654, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Python/2.5/site-packages/bzrlib/builtins.py", line 3051, in run
    exclude=safe_relpath_files(tree, exclude))
  File "/Library/Python/2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/workingtree_4.py", line 197, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/mutabletree.py", line 229, in commit
    *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/commit.py", line 305, in commit
    self._check_bound_branch(possible_master_transports)
  File "/Library/Python/2.5/site-packages/bzrlib/commit.py", line 448, in _check_bound_branch
    possible_master_transports)
  File "/Library/Python/2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/branch.py", line 2375, in get_master_branch
    possible_transports=possible_transports)
  File "/Library/Python/2.5/site-packages/bzrlib/branch.py", line 168, in open
    possible_transports=possible_transports)
  File "/Library/Python/2.5/site-packages/bzrlib/bzrdir.py", line 844, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/Library/Python/2.5/site-packages/bzrlib/bzrdir.py", line 879, in open_from_transport
    return format.open(transport, _found=True)
  File "/Library/Python/2.5/site-packages/bzrlib/bzrdir.py", line 2065, in open
    return self._open(transport)
  File "/Library/Python/2.5/site-packages/bzrlib/bzrdir.py", line 3294, in _open
    return remote.RemoteBzrDir(transport, self)
  File "/Library/Python/2.5/site-packages/bzrlib/remote.py", line 114, in __init__
    response = self._call('BzrDir.open', path)
  File "/Library/Python/2.5/site-packages/bzrlib/remote.py", line 52, in _call
    return self._client.call(method, *args)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/client.py", line 129, in call
    result, protocol = self.call_expecting_body(method, *args)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/client.py", line 142, in call_expecting_body
    method, args, expect_response_body=True)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/client.py", line 87, in _call_and_read_response
    readv_body=readv_body, body_stream=body_stream)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/client.py", line 42, in _send_request
    protocol_version)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/client.py", line 112, in _construct_protocol
    request = self._medium.get_request()
  File "/Library/Python/2.5/site-packages/bzrlib/smart/medium.py", line 699, in get_request
    return SmartClientStreamMediumRequest(self)
  File "/Library/Python/2.5/site-packages/bzrlib/smart/medium.py", line 904, in __init__
    raise errors.TooManyConcurrentRequests(self._medium)
TooManyConcurrentRequests: The medium 'SmartSSHClientMedium(connected=True, username='iguru', host='192.168.1.100', port=None)' has reached its concurrent request limit. Be sure to finish_writing and finish_reading on the currently open request.

bzr 2.0.1 on python 2.5.1 (Darwin-9.5.0-i386-32bit)