How was this working before with the UnifiedLoaderRepository based class loader? There should be the same relationship between UnifiedClassLoaders and BaseClassLoaders in the new model in terms of peers and parents. The AspectDeployer should be loaded by a BaseClassLoader that is a peer of the BaseClassLoader which loads the jboss-metadata.jar. Don't really care how its fixed for beta4, but let's be clear on how aspects are being handled in terms of class loading. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126288#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...