For CR1 the -Dxb.builder.useUnorderedSequence=true is already set. The issue appears to be that an xsd file is setup wrong and that its using a choice when it really wants multiple options. It appears that this is now being enforced in 5.1 when it hasn't in the past. XSD in question: http://anonsvn.jboss.org/repos/portal/branches/JBoss_Portal_Branch_2_7_AS... And xml file which is causing issues: http://anonsvn.jboss.org/repos/portal/branches/JBoss_Portal_Branch_2_7_AS... The xml tag in question is <identity-ui-configuration> View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4232327#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...