[jboss-user] unknown Tx PropagationContext on upgrade

We are upgrading from jboss as 4.0.3SP1 to 4.2.3.GA and are seeing many repeated messages from the CONSOLE such as the following at the end of this note. Is there anyone who could kindly drop a few clues my way as to where I can look to address these errors and why they aren't seen in the earlier jboss as version? Thanks in advance, and now the errors: 12:57:37,752 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,753 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,757 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,758 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,759 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,761 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,762 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext 12:57:37,762 ERROR [PropagationContextManager] jboss-atx: unknown Tx PropagationContext -- ASCII ribbon campaign: () against HTML email /\ against Microsoft attachments Information: http://www.expita.com/nomime.html