javax.faces.FacesException on upgrade from 7.0.1.Final to 7.0.2.Final

With some effort, I've successfully migrated a Seam 2.2 project from Jboss 5.x to 7.0.1.Final but when I tried the same ear deployment with 7.0.2.Final I ran into a FacesException when trying to access any jsf view. This is a standalone deployment using the same configuration (standalone.xml) which I carefully checked with the new version for changes (I tried with and without the small changes between 7.0.1 and 7.0.2 versions with no change).