bzr stats cannot handle revision ranges like -r2..5

It has the following error:
AttributeError: 'ProgressTask' object has no attribute 'note'

bzr: ERROR: exceptions.AttributeError: 'ProgressTask' object has no attribute 'note'

Traceback (most recent call last):
  File "/home/user/bzr-dev/bzr.dev/bzrlib/commands.py", line 926, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/home/user/bzr-dev/bzr.dev/bzrlib/commands.py", line 1126, in run_bzr
    ret = run(*run_argv)
  File "/home/user/bzr-dev/bzr.dev/bzrlib/commands.py", line 691, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/user/bzr-dev/bzr.dev/bzrlib/commands.py", line 713, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/home/user/bzr-dev/bzr.dev/bzrlib/cleanup.py", line 134, in run_simple
    return _do_with_cleanups(
  File "/home/user/bzr-dev/bzr.dev/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/home/user/.bazaar/plugins/stats/cmds.py", line 272, in run
    alternate_rev)
  File "/home/user/.bazaar/plugins/stats/cmds.py", line 186, in get_diff_info
    pb.note('getting ancestry 1')
AttributeError: 'ProgressTask' object has no attribute 'note'

Tried with both python-2.4 and python2.6, using current bzr trunk, current bzr stats plugin