Last official stable/essex release 2012.1.3 is available. Changes since 2012.1.1 are listed in upstream bug tracker: https://launchpad.net/horizon/essex/2012.1.3
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2012-1568.html