Test failing: test_accepted_message_gets_posted

This test seems to be failing on both Ubuntu 11.04 with Python 2.7.1 and Centos 6 with Python 2.6.5:

Failure in test test_accepted_message_gets_posted (mailman.app.tests.test_moderation.TestModeration)
Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/case.py", line 321, in run
    testMethod()
  File "/home/sgoss/launchpad/mailman/src/mailman/app/tests/test_moderation.py", line 99, in test_accepted_message_gets_posted
    """)
  File "/usr/lib/python2.7/unittest/case.py", line 503, in assertEqual
    assertion_func(first, second, msg=msg)
  File "/usr/lib/python2.7/unittest/case.py", line 496, in _baseAssertEqual
    raise self.failureException(msg)
AssertionError: 'From: <email address hidden>\nTo: <email address hidden>\nMessage-ID: <alpha>\nX-Mailman-Approved-At: Mon, 01 Aug 2005 07:49:23 -0700\nSubject: [Test] hold me\nX-BeenThere: <email address hidden>\nPrecedence: list\nList-Id: <test.example.com>\nX-Message-ID-Hash: XZ3DGG4V37BZTTLXNUX4NABB4DNQHTCP\nList-Post: <mailto:<email address hidden>>\nList-Subscribe: <http://<email address hidden>>,\n <mailto:<email address hidden>>\nArchived-At: http://lists.example.com/archives/XZ3DGG4V37BZTTLXNUX4NABB4DNQHTCP\nList-Unsubscribe: <http://<email address hidden>>,\n <mailto:<email address hidden>>\nList-Archive: <http://<email address hidden>>\nList-Help: <mailto:<email address hidden>?subject=help>\nX-MailFrom: <email address hidden>\nX-RcptTo: <email address hidden>\n\n' != u'From: <email address hidden>\nTo: <email address hidden>\nMessage-ID: <alpha>\nX-Mailman-Approved-At: Mon, 01 Aug 2005 07:49:23 -0400\nSubject: [Test] hold me\nX-BeenThere: <email address hidden>\nPrecedence: list\nList-Id: <test.example.com>\nX-Message-ID-Hash: XZ3DGG4V37BZTTLXNUX4NABB4DNQHTCP\nList-Post: <mailto:<email address hidden>>\nList-Subscribe: <http://<email address hidden>>,\n\t<mailto:<email address hidden>>\nArchived-At: http://lists.example.com/archives/XZ3DGG4V37BZTTLXNUX4NABB4DNQHTCP\nList-Unsubscribe: <http://<email address hidden>>,\n\t<mailto:<email address hidden>>\nList-Archive: <http://<email address hidden>>\nList-Help: <mailto:<email address hidden>?subject=help>\nX-MailFrom: <email address hidden>\nX-RcptTo: <email address hidden>\n\n'