CVS is now on 4.2.0.CR1 so that's what I'm working off ;) I guess MyFaces doesn't run converters in either directions for the Strings - this should really be specified by the spec - I guess for JSF 2.0. An option (not a great one admittedly) is to create an s:validateAll style component to apply your converter to it's children to get around this... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4037252#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...