comment traceback

Traceback (most recent call last):
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response
  77. response = callback(request, *callback_args, **callback_kwargs)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/contrib/comments/views/comments.py" in post_free_comment
  310. }, context_instance=RequestContext(request))
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/shortcuts/__init__.py" in render_to_response
  17. return HttpResponse(loader.render_to_string(*args, **kwargs))
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/loader.py" in render_to_string
  101. t = get_template(template_name)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/loader.py" in get_template
  80. template = get_template_from_string(source, origin, template_name)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/loader.py" in get_template_from_string
  88. return Template(source, origin, name)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in __init__
  171. self.nodelist = compile_string(template_string, origin)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in compile_string
  187. return parser.parse()
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in parse
  295. compiled_result = compile_func(self, token)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/loader_tags.py" in do_extends
  154. nodelist = parser.parse()
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in parse
  295. compiled_result = compile_func(self, token)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/loader_tags.py" in do_block
  132. nodelist = parser.parse(('endblock', 'endblock %s' % block_name))
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in parse
  295. compiled_result = compile_func(self, token)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/defaulttags.py" in do_if
  719. nodelist_false = parser.parse(('endif',))
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in parse
  276. filter_expression = self.compile_filter(token.contents)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in compile_filter
  360. return FilterExpression(token, self)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in __init__
  573. self.args_check(filter_name,filter_func, args)
File "/home/cuberoot/opt/lib/python2.5/site-packages/django/template/__init__.py" in args_check
  633. raise TemplateSyntaxError, "%s requires %d arguments, %d provided" % (name, len(nondefs), plen)

  TemplateSyntaxError at /comments/postfree/
  markdown requires 0 arguments, 1 provided