Migration from Jboss 4.0.3SP1 to 4.0.4GA. Could not inherit from final class. Deployment failed:

Question

I am trying to migrate from my .war application from JBoss 4.0.3 SP1 to 4.0.4 GA. I am not able to deploy the .war files here in JBoss 4.0.4 getting some VerifyError: Cannot inherit from final class which I don't get it when I deploy in my previous version JBoss. FYI, my application uses JSF for UI. Is there some library changes that does not work for the JSF in this 4.0.4 GA version or can someone tell me why my .war files are not getting deployed?

15:44:52,636 ERROR [MainDeployer] Could not create deployment: file:/C:/jboss-4.0.4.GA/server/default/deploy/bland.war/    
java.lang.VerifyError: Cannot inherit from final class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247