I'm facing the same issue with these versions but I also tried: jbossAS 4.0.5.GA, jbossportal-2.6.0-DR1 and jbossSeam from cvs (yesterday) and this issue remains, that is, the conversation is lost. I think that the problem is that the conversationId is not being written to the response when a validation fails. I see that in the class SeamPortletPhaseListener the conversationId is being written only if one of these conditions is true: - event.getPhaseId() == INVOKE_APPLICATION - facesContext.getResponseComplete() When a validation fails, both of them are false every time that the method afterPhase is executed. Any idea if this is going to be fixed in the next version? Thanks in advance, Laura View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3988331#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...