Shell app does not work with a secured cluster

shellmanager DEBUG    bcwalrus - shell_id:0 - Creating pig shell with command '['/usr/bin/pig', '-l', '/dev/null']'
[19/Apr/2012 22:33:55 +0000] shellmanager DEBUG    Clusters to potentially acquire tokens for: [<hadoop.job_tracker.LiveJobTracker object at 0x31d0dd0>, <hadoop.fs.webhdfs.WebHdfs object at 0x31d0cd0>]
[19/Apr/2012 22:33:55 +0000] middleware   INFO     Processing exception: get_delegation_token() takes exactly 2 arguments (1 given): Traceback (most recent call last):
  File "/opt/ws/hue/build/env/lib/python2.6/site-packages/Django-1.2.3-py2.6.egg/django/core/handlers/base.py", line 100, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/opt/ws/hue/apps/shell/src/shell/views.py", line 58, in create
    result = shell_manager.try_create(user, key_name)
  File "/opt/ws/hue/apps/shell/src/shell/shellmanager.py", line 524, in try_create
    shell_instance = Shell(command, subprocess_env, shell_id, username, self._delegation_token_dir)
  File "/opt/ws/hue/apps/shell/src/shell/shellmanager.py", line 86, in __init__
    delegation_token_files = self._get_delegation_tokens(username, delegation_token_dir)
  File "/opt/ws/hue/apps/shell/src/shell/shellmanager.py", line 164, in _get_delegation_tokens
    token = cluster.get_delegation_token()
TypeError: get_delegation_token() takes exactly 2 arguments (1 given)