Looks like there was an error in my jsf_core.tld. The entry <listener-class>|CONFIG_LISTEN_CLASS|</listener-class> should have been <listener-class>com.sun.faces.config.ConfigureListener</listener-class> This appears to have fixed my problem. I am wondering why, when I replaced my WAR file with one that did not have this tld file, that I was still getting this error? I removed all files in the tmp directory. I thought this would have removed anything in cache. Anyone have any ideas why this is so? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071726#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...