Thanks Shane, I don't doubt that this is fixed in 2.0 or CVS latest, but I can't easily migrate my app to the new Seam config. I'd hoped to be able to do a partial migration of a still Seam 1.2.1-based app, but running with JSF 1.2 (we've had some problems that appear fixed by the newer JSF) - we'll eventually port the rest of the app to Seam 2.0, but we'll probaby have to wait for an official GA release. Comments on Michael Yuan's blog and his success at porting his book's Seam 1.2.1 apps to Jboss 4.2 (http://www.michaelyuan.com/blog/2007/05/29/seam-book-examples-updated-to-...) made me think this was possible. I'm no longer so sure -- too many others have reported this same classloader problem and I've seen no analysis / workarounds. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4069857#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...