[Zope] xmlrpc and charsets

I'm stuck hacking the xmlrpc stuff. I can't understand the charset rules with xmlrpc in the Zope implementation. Why doesn't it provide unicode string because, the server side is not supposed to know (and has no way to know AFAIK) the charset of the client side. Should that charset be provided explicitely in the xmlrpc request to the server ? Sometimes I feel to have a dead brain when dealing with Unicode/charsets stuffs :o) Thanks for any enlightenments. --Gilles