u1sdtool on darwin outputs weird/useless messages

bash-3.2$ u1sdtool --disconnect
*--- Failure #35 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #35 ---
*--- Failure #37 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #37 ---
bash-3.2$

--disconnect during an upload
*--- Failure #49 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #49 ---

During a resumed transfer

u1sdtool --wait

ubuntuone-syncdaemon became a fully enlightened Buddha!
*--- Failure #61 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #61 ---
*--- Failure #63 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #63 ---
*--- Failure #65 ---
Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.
]
*--- End of Failure #65 ---

This is not abig deal, but... 'Connection was closed cleanly', good, I don't need to know about that ;)

Most seriously this is noise and can make automated tests harder to write for no good value, if these traces are really needed, it will be nice to have some way to get rid of them via a command-line option or some env var.