The PortletViewHandler ensures that each JSF portlet instance is porperly namespaced.

        <faces-config>
            <application>
               <view-handler>
                  org.jboss.portletbridge.application.PortletViewHandler
               </view-handler>
            </application>
            <factory>
               <faces-context-factory>
                  org.jboss.portletbridge.context.FacesContextFactoryImpl
               </faces-context-factory>
            </factory>