gannotate broken with bzr.dev

bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no attribute 'repository'

Traceback (most recent call last):
  File "/home/robertc/source/baz/bzr-test-fixes/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/home/robertc/source/baz/bzr-test-fixes/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/home/robertc/source/baz/bzr-test-fixes/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/robertc/.bazaar/plugins/gtk/__init__.py", line 320, in run
    window = GAnnotateWindow(all, plain)
  File "/home/robertc/.bazaar/plugins/gtk/annotate/gannotate.py", line 57, in __init__
    self._create()
  File "/home/robertc/.bazaar/plugins/gtk/annotate/gannotate.py", line 192, in _create
    self.revisionview = self._create_log_view()
  File "/home/robertc/.bazaar/plugins/gtk/annotate/gannotate.py", line 323, in _create_log_view
    lv = RevisionView()
  File "/home/robertc/.bazaar/plugins/gtk/revisionview.py", line 251, in __init__
    self._create_signature()
  File "/home/robertc/.bazaar/plugins/gtk/revisionview.py", line 466, in _create_signature
    self.signature_table = SignatureTab(self._branch.repository)
AttributeError: 'NoneType' object has no attribute 'repository'

bzr 1.4dev on python 2.5.2 (linux2)