Description of problem:
We are trying to add the ability to use XML-RPC to the Eclipse Bugzilla plugin.
 With 4.1 (FC5), there is a casting error that is not there in 4.0.2 (FC4).  I
have pasted the test case (XMLRPCTester.java) at the bottom of this report.

Version-Release number of selected component (if applicable):
4.1.0-0.14

How reproducible:
Always.

Steps to Reproduce:
1. wget http://overholt.ca/eclipse/servletapi4-4.0.4-3jpp_2rh.noarch.rpm; sudo
rpm -Uvh servletapi4-4.0.4-3jpp_2rh.noarch.rpm
2. wget http://overholt.ca/eclipse/xmlrpc-1.2-0.b1.3jpp.noarch.rpm; sudo rpm
-Uvh xmlrpc-1.2-0.b1.3jpp.noarch.rpm
3. javac -cp /usr/share/java/xmlrpc.jar XMLRPCTester.java
4. java -cp /usr/share/java/xmlrpc.jar:. XMLRPCTester

Actual results (4.1):
Connected to rpc server
java.io.IOException: java.lang.Object cannot be cast to gnu.java.security.OID
   at org.apache.xmlrpc.XmlRpcClient$Worker.execute (Unknown Source)
   at org.apache.xmlrpc.XmlRpcClient.execute (Unknown Source)
   at XMLRPCTester.run (XMLRPCTester.java:33)
   at XMLRPCTester.main (XMLRPCTester.java:20)

Expected results (4.0.2-8):
Connected to rpc server
Received server response
{component=eclipse, rep_platform=All, version=devel,
assigned_to=overholt, op_sys=Linux, bug_file_loc=, product=Fedora
Core, creation_ts=2005-12-12 11:53:16, status_whiteboard=, alias=,
priority=normal, groups=, assigned_to_ref={login=overholt,
name=Andrew Overholt, id=104687}, target_milestone=---, bug_severity=normal,
reporter_ref={login=ifoox, name=Igor Foox, id=178845},
delta_ts=2005-12-12 11:53:16, reporter=ifoox, short_desc=Second
Eclipse does not prompt for workspace when run natively, resolution=,
bug_status=NEW, bug_id=175547, qa_contact=}

XMLRPCTester.java
=================
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Vector;

import org.apache.xmlrpc.XmlRpcClient;
import org.apache.xmlrpc.XmlRpcException;

public class XMLRPCTester {
        String url = "https://bugzilla.redhat.com/bugzilla/xmlrpc.cgi";

        String uid = "bugtesting";
        String pass = "sqZb2B5C5z";
        String bugid = "175547";

        public static void main(String[] args){
                XMLRPCTester tester = new XMLRPCTester();

                tester.run();

        }

        public  void run() {
                XmlRpcClient xmlrpc;
                try {
                        xmlrpc = new XmlRpcClient(url);
                        System.out.println("Connected to rpc server");
                        Vector params = new Vector();
                        params.addElement(bugid);
                        params.addElement(uid);
                        params.addElement(pass);
                        // this method returns a string
                        try {
                                Object result =
                                    xmlrpc.execute("bugzilla.getBugSimple", 
                                    params);
                                System.out.println("Received server response");
                                System.out.println(result.toString());
                        } catch (XmlRpcException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                                System.out.println(e.toString());
                        } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }
                } catch (MalformedURLException e) {
                        System.err.println("Could not connect to host");
                        e.printStackTrace();
                }
        }
}