Totara 2.2.20 is a "security" release, because it includes important fixes for potential security vulnerabilities. We recommend upgrading your site to this release.

Here's the 2.2.20 changelog:

Release 2.2.20 (2nd July 2013):
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Security fixes:
    Fixes from MoodleHQ http://docs.moodle.org/dev/Moodle_2.2.10_release_notes

Improvements:
    T-10816    Improve error reporting in Totara Sync
    T-10743    Added course completion enhancements
    T-10698    Added information on locales to INSTALL.txt
    T-10702    Show email beside user name when selecting users in dialogs
    T-10666    Include debugging state for a site with registration data

Bug Fixes:
    T-10852    Fixed validation of required custom fields in Facetoface
    T-10842    Fixed completion date for activities still in progress in activity completion report
    T-10815    Fixed page set up to avoid reports export issues in Audiences
    T-10806    Added missing session date to course notifications in Facetoface
    T-9714     Users with create course/program capabilities in a category context can now see category if it is empty
    T-10735    Display activity name if session display is set to zero in Facetoface
    T-10820    Fixed user course completion report
    T-10545    Fixed RTL issues in Learning Plans
    T-10812    Fixed internationalisation issues in Facetoface
    T-10819    Fixed userfullname variable replacement in event-driven Program messages
    T-10517    Allow creating an audience without the end date
    T-10616    Make Factoface links style consistent with other links on course page
    T-9369     Fixed removal of selected courses for competencies and objectives in Learning Plans
    T-10786    Fixed RTL language progress bar direction
    T-10799    Fixed RTL language style issue in exceptions reports in programs
    T-10801    Fixed user profile fields spacing issue
    T-10805    Fixed automatic assignment of competencies by organisation
    T-10811    Fixed incorrect parameter assignment in course reminder cron
    T-10748    Added missing UTC timezone string
    T-10802    Added instruction text to Site Notices setting in Facetoface
    T-10804    Fixed issues with filenames names when exporting a report
    T-5734     Fixed readquestion method visibility inconsistency in lessons
    T-10835    Fixed user custom fields blocking execution of Totara Sync