Totara 1.1.19 and 2.2.3 are "snapshot" releases - containing bug fixes and improvements. Here's the 1.1.19 changelog:

Release 1.1.19 (5 September 2012):
==================================================

Database upgrades:
    T-9793      Fix SCORM activity completion when using view criteria only
    T-9772      Add standard column and filter options to Report Builder source

Bug fixes:
    T-9771      Fix MSSQL error in program cron
    T-9770      Fix contexturl in Face To Face manager approval task
    T-9774      Fix MSSQL error in plan cron
    T-9778      Fix javascript error when adding program to a plan in Dutch
    T-9332      Fix bulk reclassify hierarchy item types
    T-9786      Rename timeallowance string on Program content tab
    T-9787      Fix issues with SCORM form display settings
    T-9794      Fix search when assigning members to cohort
    T-9796      Support defaultuserrole in Report Builder access restriction
    T-9789      Fix for SQL error on Feedback module
    T-9769      Fix Report Builder cron for scheduled reports with no public saved search
    T-9792      Add changes to INSTALL.txt on php.ini configuration settings
    T-9847      Fix sending Program enrolment emails to users who have already completed the program
    T-9791      Fix Face To Face conditional availability issues
    T-5879      Fix broken Swedish langstring in Feedback report source
    T-9810      Ensure all program completions are run in Program cron
    T-9809      Fix recurring course repeat values in Program Management accepting negative integers
    T-9848      Fix handling of any programs contained in course category being deleted
    T-9902      Fixes for the dialog hierarchy filters in Report Builder
    T-9909      Fixes for the basic hierarchy filters in Report Builder
    T-9908      Fix cron sending messages to deleted users
    T-9830      Prevent delete of Miscellaneous (or last remaining) Course Category

and here's the 2.2.3 changelog:

Release 2.2.3 (5 September 2012):
==================================================

Database upgrades:
    T-9888      Backport SCORM directview patch MDL-33755 from 2.3

API Changes
    T-9875      Program Management performance improvements to update_learner_assignments()            A number of program management functions have changed names as well as some arguments:
                                                                                                       create_future_assignment() => create_future_assignments_bulk(),
                                                                                                       assign_learner() => assign_learners_bulk(),
                                                                                                       new function courseset_group_timedue_bulk().

Improvements:
    T-9856      Add script to allow completion cron to run as separate crontab job
    T-9879      Add time created content restriction to user source

Bug fixes:
    T-9909      Fixes for the basic hierarchy filters in Report Builder
    T-9902      Fixes for the dialog hierarchy filters in Report Builder
    T-9901      Fixes for course Demo format navigation & title
    T-9830      Prevent delete of Miscellaneous (or last remaining) Course Category
    T-9869      Fixes for RTL support in help popups
    T-9887      Fix for Site Summary PHP Notice during install
    T-9893      Fix MSSQL errors when moving hierarchy items
    T-9809      Fix recurring course repeat values in Program Management accepting negative integers
    T-9817      Totara sync now accepts underscores in mapped columns

Simon