[Zope] Problems with xml-rpc

Hi all, The last problem I was having with xmlrpc and Zope was "Growing Refcounts" (you can review it in this mailing list). I resolved the problem applying the patch to xmlrpclib.py referenced in http://www.pythonware.com/products/xmlrpc/bug-xmlrpc1.htm. ¿Why, you, people of DC do not apply this patch? But now there seems to appear another problem related to xml-rpc. I'm using a python xmlrpc client to talk to a Zope server. The problem appears if I pass a string argument containing the symbol "&". Example

s = xmlrpclib.Server('http://localhost/RPC') s.anymethod('string & parameter')

The zope server responds: xmlrpclib.Fault: <Fault -2: 'Unexpected Zope error value: <unknown>:1:0: not well-formed\012\012\012'> I am using Zope-2.3.2.