The error on the ML above is caused to do a refectoring between KC-1.0-beta-4 and KC-1.0.Final.

In September 2014, for our own 1.0.2 release, we started using Keycloak 1.0.Final, but did not catch this at the time.

A bit more information on the actual commit that is causing this error:
http://lists.jboss.org/pipermail/keycloak-dev/2014-December/003268.html