Messaging 1.2.0.CR1 in the head did not break the build. I have tested the build personally, and everything was compiling just fine. Check out a 23/Feb/07 02:21 AM PST snapshot of the head and try for yourself, if you don't belive me. AOP 2.0.0.Alpha3 in the head broke the build. Before checking-in the change in SVN, you should have updated the head, as it was, delete 'thirdparty', and try to build locally, and you'd have seen that it breaks, because Messaging declars compatibility with AOP 1.5.x only. The next step would have been to post on the Messaging development forum, or to me or Tim personally, we don't mind, or create a Messaging JIRA issue and ask us to validate 1.2.0.CR1 with AOP 2.0.0.Alpha3, by running our testsuites with AOP 2.0.0.Alpha3. That did not happen, somebody just modified our component-info.xml in the head, as in "oh well, who cares ...". Anyway, http://jira.jboss.org/jira/browse/JBMESSAGING-892 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4021458#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...