Last official stable/essex release 2012.1.3 is available. Changes since 2012.1.1 are listed in upstream bug tracker: https://launchpad.net/nova/essex/2012.1.2 and https://launchpad.net/nova/essex/2012.1.3
RPM changelog since 2012.1.1-15: - Restore libvirt block storage connections on reboot - Fix libvirt volume attachment error logging - Ensure instances with deleted floating IPs can be deleted - Ensure can contact floating IP after instance snapshot - Fix tenant usage time accounting - Ensure correct disk definitions are used on volume attach/detach - Improve concurrency of long running tasks - Fix unmounting of LXC containers in the presence of symlinks - Fix external lock corruption in the presence of SELinux - Allow snapshotting images that are deleted in glance - Ensure the correct fixed IP is deallocated when deleting VMs
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-2012-1567.html