I wonder if Seam 1.3 (currently only in CVS) is supposed to be able to run in Java 6? If so, then I'll report issues I find (such as a "[SOAPFaultHelperJAXWS] SOAP request exception java.lang.UnsupportedOperationException: setProperty must be overridden by all subclasses of SOAPMessage" that I seem to get in the SeamBay example in JDK 1.6, but not in 1.5). I've seen few posts for older versions: Building Seam CVS with ant build The main problems that I have encountered are that JBoss unfortunately includes many JARs for packages that are now part of the Java 6 distribution. SEAM INSTALLATION Use JDK 5.0. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048667#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...