nefarious,
The problem here is with the class-xmlrpc.php file. For a start the constructor for xmlrpcvar isn’t behaving itself in the RC1 release. If you check out the latest version of the source from CVS someone has hacked around and made it work ;).
I wish /I/ had bothered to look for updated files, could have saved myself an hour tracking it down and doing a custom fix.
-BK
