Pete, one thing i couldn't figure out yet is why the ErraiExtension#afterBeanDiscovery(...) (that should register the observer method) doesn't get invoked. When running the example you'll see that the ErraiExtension<init> is invoked by the service loader. So the base setup seems to be correct. Any ideas? /Heiko -- -- Heiko Braun hbraun(a)redhat.com http://jboss.org/errai . http://relative-order.blogspot.com/