It should be 100% backwards compatible. Take a backup of your workspace if you by any chance prove me wrong. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4141502#4141502 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4141502