Seeing this when deploying any of the quickstarts to Riftsaw built from trunk (with Sun JDK 1.5) and JBoss AS 5.1.0 GA:
21:07:09,381 ERROR [SOAPFaultHelperJAXWS] SOAP request exception
java.lang.UnsupportedOperationException: setProperty must be
overridden by all subclasses of SOAPMessage
Running with the JDK 1.6 version of AS 5.1 (http://sourceforge.net/projects/jboss/files/JBoss/JBoss-5.1.0.GA/jboss-5.1.0.GA-jdk6.zip) resolves the problem.