Pete, Thanks for the reply. Something really strange is going on. The best way to describe what is happening is I have several of these drop down lists, one for status, one for priority, etc. I can go in and make an unrelated change to the xhtml fragment, compile and deploy it and the error below fires on one of the list boxes. I go back to the xhtml, re-edit the selectOneMenu with the exact same information, deploy it and the problem moves to the next list box. Its like I have the wrong version of a serialized object or something. I stop/start JBoss, but the problem remains. Any ideas? Cheers! MG View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4091267#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...