"pavel.tsekov(a)redhat.com" wrote : | So, if I got it right this means that it is safe to exclude all jgroups classes excepth "*Exception" when testing agains 1.4.0 GA ? | Yes "pavel.tsekov(a)redhat.com" wrote : | Does 1.4.x support region-based marshalling i.e. for backward compatibility with older versions i.e. is it possible to run 1.4.x with 1.3.x so that they'll exchange java serialized objects ? | Yes. This is how backward compat is maintained, and in such a case, the same version of JGroups needs to be used on both nodes, so svuid problems on the JGroups level goes away. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3997673#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...