AttributeError: 'unicode' object has no attribute 'get' on bzr launchpad-login username

Fri 2013-03-01 22:45:47 +0100
0.166 bazaar version: 2.5.1
0.167 bzr arguments: [u'launchpad-login', u'bajkar']
0.170 looking for plugins in /home/mkieszek/.bazaar/plugins
0.174 looking for plugins in /usr/lib/python2.7/site-packages/bzrlib/plugins
0.201 encoding stdout as sys.stdout encoding 'UTF-8'
0.696 Transferred: 1kB (9.2kB/s r:1kB w:0kB)
0.707 Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 920, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 1131, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 695, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/plugins/launchpad/__init__.py", line 288, in run
    account.set_lp_login(name)
  File "/usr/lib/python2.7/site-packages/bzrlib/plugins/launchpad/account.py", line 82, in set_lp_login
    _set_auth_user(username)
  File "/usr/lib/python2.7/site-packages/bzrlib/plugins/launchpad/account.py", line 95, in _set_auth_user
    'Launchpad', '.launchpad.net', username, 'ssh')
  File "/usr/lib/python2.7/site-packages/bzrlib/config.py", line 1959, in set_credentials
    if existing_values.get(key) != values.get(key):
AttributeError: 'unicode' object has no attribute 'get'

0.719 couldn't find apport bug-reporting library: No module named apport
0.800 return code 4