I had it print out the classloader in question, and got: org.jboss.mx.loading.UnifiedClassLoader3@3a396fce{ url=file:/usr/java/jboss/server/default/tmp/deploy/tmp2172MyApp.ear | No idea what to make of this, because I can't find ANY place that it could be loading this old version from. I have looked in every jar in the JBoss directory. Does JBoss ever load classes over the net, or from remote sources? Is there any way to make this UnifiedClassLoader just tell me which jar file it's looking at? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3998900#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...