IPC error on u1sdtool

On windows, if you call u1sdtool without arguments, it shows this error at the end of the help message (works ok if you pass any options, including -h):

  --version Print the version number and exit
Unhandled error in Deferred:
Traceback (most recent call last):
  File "twisted\internet\defer.pyc", line 388, in errback

  File "twisted\internet\defer.pyc", line 455, in _startRunCallbacks

  File "twisted\internet\defer.pyc", line 542, in _runCallbacks

  File "twisted\internet\defer.pyc", line 1076, in gotResult

--- <exception caught here> ---
  File "twisted\internet\defer.pyc", line 1018, in _inlineCallbacks

  File "twisted\python\failure.pyc", line 349, in throwExceptionIntoGenerator

  File "ubuntuone\platform\windows\ipc_client.pyc", line 730, in connect

ubuntuone.platform.windows.ipc_client.SyncDaemonClientConnectionError: ('Could not connect to the syncdaemon ipc.', ConnectError(<twisted.python.failure.Failure <class 'twisted.internet.error.ConnectionLost'>>,))