If you look at http://hudson.qa.jboss.com/hudson/view/JBoss%20AS/job/JBoss-AS-6.0.x-testSuite-sun16/658/testReport/ all of the org.jboss.test.messagedriven.test* tests failed with "Caused by: javax.jms.JMSSecurityException: Unable to validate user: null"

Exception stack trace for one of the problems (from AS hornetq/server.log) is here: http://pastebin.com/jpRjZDpc?

I am curious if https://jira.jboss.org/jira/browse/SECURITY-491 could be related to this issue.