More info: I just put a logger in my setter for the collection. Of course the setter is never called, so that means that at no point is EJB even trying to install a proxy in there. If anyone can show me an example of mapping a collection that works, and the collection is restored when the object is fetched, I would be quite amazed by that. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3965652#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...