Thanks, everyone, for your rapid replies. 1. I've gone ahead and added this feature, and I don't think it will have any impact on any other projects. 1a) Upon further inspection, I see that org.jboss.invocation.unified.marshall.InvocationMarshaller acts only upon InvocationRequests, so in the server-to-client direction it has no effect. 1b) Just in case, I added the parameter org.jboss.remoting.transport.rmi.RMIServerInvoker.RMI_ONEWAY_MARSHALLING (actual value "rmiOnewayMarshalling"), which, when set to "true", will cause the RMI transport to revert to its current marshalling behavior. 2. Galder, where are those "unified invoker unit tests" tests you mentioned? I'd like to take a look at them. 3. Bill, where is org.jboss.serial.io.MarshalledObjectForLocalCalls? 4. Finally, Galder, note that it's never to early to start agitating for a meeting in Neuchatel next September. :-) -Ron View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4136167#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...