Looks like this one is caused by changes to page.xml files in Seam 2.0. It now uses different XSD. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058474#4058474 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4058474