This is a MySQL server upgrade from version 5.6.16-64.2-569 to 5.6.22-71.0-726 and fixes a (low risk) bug that was recently published. No functional changes were discovered in the acceptance tests nor distilled from the Percona changelog, so everything should work as usual!
The upgrade also squelches a warning from the Qualys scan. Upgrading took place between 2:05 and 2:10 am and caused up to 25 seconds downtime.