Importantly to my well being in put in that private FlushModeType actualFlushMode = FlushModeType.AUTO; and now I'm running without crashes. When I'm out of trouble for the afternoon I'll look again. One hint how I got there might be: Page action returns outcome, navigation rule makes it redirect to another page. Not sure about details though. And it happens during a login redirection that I've been mentioning I'm working on. Not sure though whether that makes/made any difference. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026457#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...