test_bug_commenting windmill test is failing

test_results: ERROR Test Failure in test {'version': '0.1', 'suite_name': 'Bug commenting', 'result': False, 'starttime': '2009-7-18T14:45:29.218Z', 'output': None, 'params': {'xpath': '//a[@href="+addcomment" and @class="sprite add js-action"]', 'uuid': 'a031cf6a-8bec-11de-8003-001e8cb51ce3'}, 'endtime': '2009-7-18T14:45:39.703Z', 'method': 'waits.forElement'}
Traceback (most recent call last):
  File "/devel/launchpad/rocketfuel/lib/lp/bugs/windmill/tests/test_bugs/test_bug_commenting.py", line 28, in test_bug_commenting
    client.waits.forElement(xpath=ADD_COMMENT_LINK)
  File "/devel/launchpad/rocketfuel/eggs/windmill-1.2-py2.4.egg/windmill/authoring/__init__.py", line 164, in __call__
    return self.exec_method(self.action_name, **kwargs)
  File "/devel/launchpad/rocketfuel/eggs/windmill-1.2-py2.4.egg/windmill/authoring/__init__.py", line 217, in _exec_test
    raise WindmillTestClientException(result['result'])
WindmillTestClientException: {'suite_name': 'Bug commenting', 'result': False, 'starttime': '2009-7-18T14:45:29.218Z', 'params': {'xpath': '//a[@href="+addcomment" and @class="sprite add js-action"]'}, 'output': None, 'endtime': '2009-7-18T14:45:39.703Z', 'method': 'waits.forElement'}

windmill.authoring: ERROR Functest test failed: test_bug_commenting