I changed the MyFaces dependency in Shale to 1.1.4-SNAPSHOT. Tomahawk 1.1.4-SNAPSHOT (used by the new shale-petstore) will not work properly using the old 1.1.1 dependency. Please rebuild the shale framework before attempting to build shale-petstore or you will inject the old 1.1.1 jars into the webapp and break it.
There are ways around this but I think we should be upgrading to the latest MyFaces stuff. 1.1.4 is supposedly close to release at this point. Sean