The EJB 3.0 RC9 Patch 1 implementation is only usable with JBoss 4.0.5.GA. The patch has been released to provide compatibility with the full (non-installer) release for JBossAS 4.0.5. The patch also corrects a problem with the installer version that caused hot redeploys to fail with a classloading issue
$ cd jboss-EJB-3.0_RC9_Patch1-FD $ ant -f install.xml -Djboss.server.config=[server directory you want to patch]
jboss.server.config defaults to all