Ola, Alguem ja passou por isso ?
RichFaces, Facelest
java.lang.AbstractMethodError: javax.faces.render.ResponseStateManager.isPostback(Ljavax/faces/context/FacesContext;)Z
com.sun.faces.lifecycle.RestoreViewPhase.isPostback(Unknown Source)
com.sun.faces.lifecycle.RestoreViewPhase.execute(Unknown Source)
com.sun.faces.lifecycle.LifecycleImpl.phase(Unknown Source)
com.sun.faces.lifecycle.LifecycleImpl.execute(Unknown Source)
javax.faces.webapp.FacesServlet.service(Unknown Source)