Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/qbzr/lib/util.py", line 884, in run_in_loading_queue
    f(*args, **kargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/qbzr/lib/uifactory.py", line 32, in decorate
    r = f(*args, **kargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/qbzr/lib/log.py", line 629, in load_delta
    repos = [gv.get_revid_branch(revid).repository for revid in revids]
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/qbzr/lib/loggraphviz.py", line 1021, in get_revid_branch
    return self.get_revid_branch_info(revid).branch
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/qbzr/lib/loggraphviz.py", line 1014, in get_revid_branch_info
    raise GhostRevisionError(revid)
GhostRevisionError: {username@gaikai.com-20110520202023-buum6clf1kzxkcq7} is a ghost.