#185 WikiMailDiscussion is giving a Site Error when you view it

Traceback:

  File /usr/local/zope/2.5.0/lib/python/ZPublisher/Publish.py, line 150, in publish_module
  File /usr/local/zope/instance/Products/Localizer/__init__.py, line 65, in new_publish
  File /usr/local/zope/2.5.0/lib/python/ZPublisher/Publish.py, line 114, in publish
  File /usr/local/zope/2.5.0/lib/python/Zope/__init__.py, line 158, in zpublisher_exception_hook
    (Object: zwiki)
  File /usr/local/zope/2.5.0/lib/python/ZPublisher/Publish.py, line 98, in publish
  File /usr/local/zope/2.5.0/lib/python/ZPublisher/mapply.py, line 88, in mapply
    (Object: WikiMailDiscussion)
  File /usr/local/zope/2.5.0/lib/python/ZPublisher/Publish.py, line 39, in call_object
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 147, in __call__
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 167, in _render
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 283, in render_stxprelinkdtmlhtml
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 895, in _renderWithLinks
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 916, in _updateLinkRenderings
    (Object: WikiMailDiscussion)
  File /usr/local/zope/instance/Products/ZWiki/ZWikiPage.py, line 989, in _renderLink
    (Object: WikiMailDiscussion)
  File /usr/local/mystuff/lib/python2.1/sre.py, line 57, in search
  File /usr/local/mystuff/lib/python2.1/sre.py, line 136, in _compile
 error