OPENJPA-2325: MappedSuperClass without an @Id causes wrong identity type for the inherited types - back-ported to 2.0.x Pinaki Poddar's commit to trunk, as well as an additional change he made specific to 2.0.x.
openjpa/branches/2.0.x/openjpa-kernel/src/main/java/org/apache/openjpa/kernel/BrokerImpl.java