OK, this is a valid reason. So I will use the newest Hibernate version with Seam 2 unofficially. ;) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100296#4100296 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4100296