Totara 2.2.17 is a "snapshot" release containing bug fixes.

Here's the 2.2.17 changelog:

Release 2.2.17 (11th April 2013):
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Database upgrades:

    T-10385      Fix invalid foreign key reference in totara_cohort install
    T-10462      Fix totara_message upgrade bug when no messaging report exists
    T-10428      Fix totara_message upgrade bug when userfrom or userto do not exist
    T-10315      Fixes for broken totaramessage report source in Report Builder

Improvements:
    T-9580       Add option to Report Builder to filter by deleted/active users
    T-10211      Add "is enrolled" filter to course completion by organisation
                 report source in Report Builder

Bug fixes:
    T-10458      Fix issues with right-to-left languages in the Kiwifruit Theme
    T-10371      Fix the wording of breadcrumbs on my/teammembers.php
    T-6080       Fix display of debugging message
    T-10446      Fix problem with navigation if "Learning Plan" block is placed too early on page
    T-10400      Fix SQL error in My Learning for managers (Totara Stats block)
    T-10399      Fix flushing of data in SCORM 1.2 if network connection fails
    T-10412      Fix default page orientation in Certificate module
    T-10466      Fix MSSQL query bug when viewing a user's forum posts in their profile
    T-10405      Fix custom field placeholder substitutions in reminder emails for Facetoface
    T-10389      Fix email subjects in Learning Plans when multilang filter is enabled
    T-10414      Revert Audience search case insensitivity patch from 2.2.14                       This was causing audiences based on "Menu of choices" custom fields to be empty
    T-10384      Fix saving of import_deleted configuration field in totara_sync