Seam 2.0.0.BETA uses richfaces 3.0.1, Seam CVS uses 3.1.0. Upgrade Seam. Or don't use verify objects. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4084242#4084242 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4084242