I have recreated the JBoss AS deployment directory (by moving aside my old version and unzipping the 4.2.2 download again). Now, I get: | 15:05:38,710 INFO [Scanner] scanning: /Users/bostroff/Downloads/jboss-4.2.2.GA/server/default/./deploy/cehc.war/WEB-INF/dev | 15:05:38,717 ERROR [[/cehc]] Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener | java.lang.UnsupportedClassVersionError: Bad version number in .class file | Some googling around suggests that this typically happens when you have some a jar compiled with JDK 1.6 and are running an earlier version of the JDK. I am (unfortunately?) running Leopard on a Mac and can only run JDK 1.5. Might this be my current problem (or the root of many of my problems)? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4119837#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...