There is a small bug, du to a bug in preferences default management: http://jira.jboss.com/jira/browse/JBPORTAL-911 JBPORTAL-911 is resolved in 2.4 RC3. (not RC2). If you are using a previous version, Michelle Osmond is making a work around in the implementation, that will be on the next version. another work around is not to let an empty preference for the NameSpace of the source of a message (and therefore in the corresponding message name in the receiver). Set a real NameSpace and it works fine. There is also something going wrong on Jboss Portal, in the edit mode of the example portlet1/2. Osmond is looking at it and will try to set a workaround also. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963670#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...