bzr: ERROR: exceptions.KeyError: ('hg:f1', 'hg-v1:4ecdc743682858e9f5bafa414b4c1894f9f9cd71')

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 917, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1117, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 691, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 710, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/tmp/hg/commands.py", line 55, in run
    to_branch.pull(from_dir.open_branch())
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 1069, in pull
    possible_transports=possible_transports, *args, **kwargs)
  File "/tmp/hg/branch.py", line 312, in pull
    inter.fetch(revision_id=stop_revision)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/tmp/hg/fetch.py", line 674, in fetch
    self.addchangegroup(cg, mapping)
  File "/tmp/hg/fetch.py", line 553, in addchangegroup
    self._add_inventories(todo, mapping, pb)
  File "/tmp/hg/fetch.py", line 407, in _add_inventories
    manifest, flags, files, rev, mapping)
  File "/tmp/hg/fetch.py", line 344, in _import_manifest_delta
    self._symlink_targets.__getitem__))
  File "/tmp/hg/fetch.py", line 208, in manifest_to_inventory_delta
    (fileid, ie.revision))
KeyError: ('hg:f1', 'hg-v1:4ecdc743682858e9f5bafa414b4c1894f9f9cd71')

bzr 2.3b3 on python 2.6.6 (Linux-2.6.32-5-686-i686-with-debian-6.0)
arguments: ['/usr/bin/bzr', 'hg-import', 'hg-repo', 'bzr-repo']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'ru_RU.UTF-8'
plugins:
  bash_completion      /usr/lib/python2.6/dist-packages/bzrlib/plugins/bash_completion [2.3b3]
  builddeb             /usr/lib/python2.6/dist-packages/bzrlib/plugins/builddeb [2.2.0]
  builder              /usr/lib/python2.6/dist-packages/bzrlib/plugins/builder [unknown]
  bzrtools             /usr/lib/python2.6/dist-packages/bzrlib/plugins/bzrtools [2.3.0]
  dbus                 /usr/lib/python2.6/dist-packages/bzrlib/plugins/dbus [0.1.0dev]
  explorer             /usr/lib/python2.6/dist-packages/bzrlib/plugins/explorer [1.1b1]
  fastimport           /usr/lib/python2.6/dist-packages/bzrlib/plugins/fastimport [0.10.0dev]
  gtk                  /usr/lib/python2.6/dist-packages/bzrlib/plugins/gtk [0.99.1]
  hg                   /tmp/hg [0.2.0dev]
  launchpad            /usr/lib/python2.6/dist-packages/bzrlib/plugins/launchpad [2.3b3]
  netrc_credential_store /usr/lib/python2.6/dist-packages/bzrlib/plugins/netrc_credential_store [2.3b3]
  news_merge           /usr/lib/python2.6/dist-packages/bzrlib/plugins/news_merge [2.3b3]
  qbzr                 /usr/lib/python2.6/dist-packages/bzrlib/plugins/qbzr [0.20.0dev1]
  rewrite              /usr/lib/python2.6/dist-packages/bzrlib/plugins/rewrite [0.6.2dev]

*** Bazaar has encountered an internal error.  This probably indicates a
    bug in Bazaar.  You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.