AttributeError: 'NoneType' object has no attribute 'write' during git import

Don't really know if a bug in bzr-git or anything else, but since 28/06/2011 the import of midori git fail.
http://launchpadlibrarian.net/74864009/vcs-imports-midori-master.log

I did a git clone to check and it's running ok.

Traceback (most recent call last):
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/scripts/code-import-worker.py", line 82, in <module>
    sys.exit(script.main())
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/scripts/code-import-worker.py", line 77, in main
    return import_worker.run()
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/lib/lp/codehosting/codeimport/worker.py", line 483, in run
    return self._doImport()
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/lib/lp/codehosting/codeimport/worker.py", line 650, in _doImport
    self.pushBazaarBranch(bazaar_branch)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/lib/lp/codehosting/codeimport/worker.py", line 719, in pushBazaarBranch
    self, bazaar_branch)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/lib/lp/codehosting/codeimport/worker.py", line 451, in pushBazaarBranch
    self.required_format)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/lib/lp/codehosting/codeimport/worker.py", line 160, in push
    pull_result = remote_branch.pull(bzr_branch, overwrite=True)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 1089, in pull
    possible_transports=possible_transports, *args, **kwargs)
  File "<string>", line 4, in pull_write_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 3483, in pull
    merge_tags_to_master=not source_is_master)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 3593, in _pull
    overwrite=overwrite, graph=graph)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 1038, in update_revisions
    overwrite, graph)
  File "<string>", line 4, in update_revisions_write_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 3435, in update_revisions
    self.target.fetch(self.source, stop_revision)
  File "<string>", line 4, in fetch_write_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/branch.py", line 687, in fetch
    pb=pb)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/repository.py", line 1781, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "<string>", line 4, in fetch_write_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/repository.py", line 3432, in fetch
    to_format=self.target._format)
  File "/srv/importd.launchpad.net/production/launchpad-rev-13376/eggs/bzr-2.3.3-py2.6-linux-x86_64.egg/bzrlib/ui/text.py", line 264, in show_user_warning
    self.stderr.write(self.format_user_warning(warning_id, message_args) +
AttributeError: 'NoneType' object has no attribute 'write'