'module' object has no attribute 'bzrcommitmessage'

bzr: ERROR: exceptions.AttributeError: 'module' object has no attribute 'bzrcommitmessage'

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/commands.py", line 650, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/commands.py", line 612, in run_bzr
    ret = run(*run_argv)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/commands.py", line 304, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/builtins.py", line 2118, in run
    reporter=reporter)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/decorators.py", line 165, in write_locked
    return unbound(self, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/workingtree_4.py", line 244, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/decorators.py", line 165, in write_locked
    return unbound(self, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/mutabletree.py", line 160, in commit
    revprops=revprops, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/bzrlib/commit.py", line 369, in commit
    'rev_id':self.rev_id})
  File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute 'bzrcommitmessage'

bzr 0.15.0 on python 2.5.0.final.0 (darwin)
arguments: ['/Library/Frameworks/Python.framework/Versions/Current/bin/bzr', 'commit', '-m', 'testing commit message']