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

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 611, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 573, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 282, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 1798, in run
    reporter=reporter)
  File "/usr/lib/python2.4/site-packages/bzrlib/decorators.py", line 51, in write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/mutabletree.py", line 128, in commit
    revprops=revprops, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/commit.py", line 345, in commit
    {'branch':self.branch,
  File "<string>", line 0, in ?
AttributeError: 'module' object has no attribute 'email'

bzr 0.11.0 on python 2.4.4.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'ci', '-mnew upstream release']

** please send this report to bazaar-ng@lists.ubuntu.com