For JBossMessaging, we have adapted our code to test also the size of the array... but I just think changing semantics on the API is kind of dangerous. I don't know if other users will have problems with that. As you guys know your user base, take the decision thinking how other users would accept this change. Anyway I would clearly document this change on the release notes and documentation if you go that path. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4032157#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...