This wiki's backlinks template gave an error.
Traceback (most recent call last):
  File "/home/zope/zope.org/var/app1/Products/ZWiki/UI.py", line 160, in backlinks
    return form(self,REQUEST)
  File "/home/zope/zope.org/opt/Zope-2.6-branch/lib/python/OFS/DTMLMethod.py", line 126, in __call__
    r=apply(HTML.__call__, (self, client, REQUEST), kw)
  File "/home/zope/zope.org/opt/Zope-2.6-branch/lib/python/DocumentTemplate/DT_String.py", line 474, in __call__
    try: result = render_blocks(self._v_blocks, md)
  File "/home/zope/zope.org/opt/Zope-2.6-branch/lib/python/OFS/DTMLMethod.py", line 119, in __call__
    r=apply(HTML.__call__, (self, client, REQUEST), kw)
  File "/home/zope/zope.org/opt/Zope-2.6-branch/lib/python/DocumentTemplate/DT_String.py", line 474, in __call__
    try: result = render_blocks(self._v_blocks, md)
  File "/home/zope/zope.org/opt/Zope-2.6-branch/lib/python/DocumentTemplate/DT_Util.py", line 201, in eval
    return eval(code, d)
  File "", line 1, in 
TypeError: standard_wiki_header() takes at most 2 non-keyword arguments (4 given)