Some more information. I cannot change the preferences on any of the portlets that ship with the portal. Even if I create new instances. I tried changing a preference for the weather poertlet and got the same error. In 2.4.0.CR3, the compoundPortletId for the CMS portlet was local._1 and for the weather portlet was local._9. In 2.4.0.GA, the componentPortletIds are local.portal.CMSPortlet and local.samples.WeatherPortlet. The StatefulPortletInvoker.setProperties method throws an exception if the simple portletId does not start with an underscore. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3967721#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...