Odd - XHTML seems to allow class on a tr element. Well, take this to the JSF RI team/firefox team I think. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078811#4078811 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4078811