"tom.baeyens(a)jboss.com" wrote : also please add a bit about the motivations to move to the sun JSF impl. The main reason was so I could take advantage of f:phaseListener. I think that once myfaces gains JSF 1.2 support, we could probably make it interchangable. "tom.baeyens(a)jboss.com" wrote : i would guess that the move to suns jsf impl also implied the move to sun-servlet/2.5/lib/servlet-api.jar and sun-servlet/2.5/lib/jsp-api.jar The servlet 2.5 jars are just so that I can use jbossretro on JSF. JBoss 4.0.4 is using tomcat 5.5, which I think implements the 2.4 spec? In any case, the 2.5-specific classes that it was complaining about pertain to JSP, so we're safe there. If someone were running under a 5.0 JRE they could use the 2.4 servlet jars and bundle the original jsf-api and jsf-impl jars instead. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982112#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...