In the RHEL3-U4-errata version of python that got pushed out, there's a small
error in python-2.2-xmlfix.patch that causes python XMLRPC servers to reject all
method calls, which means the XMLRPC server us pretty much useless.  The actual
error/traceback is covered up by the try/except block.

--- 161,168 ----
                      try:
                          func = _resolve_dotted_attribute(
                              self.server.instance,
!                             method,
!                             self.allow_dotted_names
                              )
                      except AttributeError:
                          pass

This comes from SimpleXMLRPCRequestHandler._dispatch() method, but
SimpleXMLRPCRequestHandler doesn't have the "allow_dotted_names" variable. 
SimpelXMLRPCServer does.  So the correct fix is:

--- 161,168 ----
                      try:
                          func = _resolve_dotted_attribute(
                              self.server.instance,
!                             method,
!                             self.server.allow_dotted_names
                              )
                      except AttributeError:
                          pass

(self.allow_dotted_names -> self.server.allow_dotted_names)