Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/mod_python/publisher.py", line 213, in handler
    published = publish_object(req, object)

  File "/usr/lib/python2.4/site-packages/mod_python/publisher.py", line 412, in publish_object
    return publish_object(req,util.apply_fs_data(object, req.form, req=req))

  File "/usr/lib/python2.4/site-packages/mod_python/util.py", line 439, in apply_fs_data
    return object(**args)

  File "/usr/share/koji-web/scripts/index.py", line 175, in index
    start=buildStart, dataName='builds', prefix='build', order=buildOrder, pageSize=10)

  File "/usr/share/koji-web/lib/kojiweb/util.py", line 109, in paginateMethod
    totalRows = getattr(server, methodName)(*args, **kw)

  File "/usr/lib/python2.4/site-packages/koji/__init__.py", line 1075, in __call__
    return self.__func(self.__name,args,opts)

  File "/usr/lib/python2.4/site-packages/koji/__init__.py", line 1300, in _callMethod
    return proxy.__getattr__(name)(*args)

  File "/usr/lib/python2.4/xmlrpclib.py", line 1096, in __call__
    return self.__send(self.__name, args)

  File "/usr/lib/python2.4/xmlrpclib.py", line 1383, in __request
    verbose=self.__verbose

  File "/usr/lib/python2.4/xmlrpclib.py", line 1137, in request
    headers

ProtocolError: