ubuntuone.SyncDaemon.sync - ERROR - Node delta for ... can't be applied.

[Chris Bainbridge]

2012-02-16 12:50:17,622 - ubuntuone.SyncDaemon.sync - ERROR - Node delta for :efc92ff9-459f-4dd3-9989-7b61b4883478 can't be applied.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/sync.py", line 1188, in handle_AQ_DELTA_OK
    node = self._handle_SV_DIR_NEW(*args)
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/sync.py", line 896, in _handle_SV_DIR_NEW
    path = os.path.join(parent["path"], name)
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/sync.py", line 98, in __getitem__
    return self.get(key)
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/sync.py", line 77, in get
    mdid = self.get_mdid()
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/sync.py", line 67, in get_mdid
    self.keys["node_id"]]
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/filesystem_manager.py", line 192, in __getitem__
    return dict.__getitem__(self, key)
KeyError: ('', 'eae5aca7-3470-46b9-980c-2fbff570a934')

log at https://launchpadlibrarian.net/93074103/syncdaemon-exceptions.log
ubuntuone-client 2.0.0-0ubuntu2.3 on Oneiric.