I am using jboss portal 2.0.2 in AS 4.0.5 GA.
When i am going to admin panel i see:
occured while rendering window 'default.Admin.ManagementPortletWindow' /WEB-INF/jsp/management/index.xhtml @41,58 rendered="#{!empty node.children}": Exception getting value of property children of base of type : org.jboss.portal.core.portlet.management.LazyPortalObjectTreeNode
I use jdk 1.5 and now its ok