Totara 1.1.25 is a "snapshot" release containing bug fixes and improvements.

Here's the changelog:

Release 1.1.25 (25th February 2014):
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Bug Fixes:
    T-9571     Updated Copyright notices
    T-11797    Fixed nullability of positionid field in prog_pos_assignment to prevent errors on upgrade from 1.1 to 2.2
    T-11852    Fixed possible duplicate role errors when upgrading from moodle 1.9
    T-11629    Fixed programs sending duplicate enrolment messages when changing due date between set date and relative date

Totara 2.2.25 is a "security" release, because it includes important fixes for potential security vulnerabilities.

Here's the changelog:

Release 2.2.27 (25th February 2014):
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Security Fixes:
    T-11785    Cleaned modulename parameter before generating coursemodule instances

Improvements:
    T-11852    Improved error messages for duplicate roles when upgrading from Totara 1.1

Bug Fixes:
    T-11819    Fixed error on upgrade from 1.1 where image exists multiple times in textarea custom fields
    T-11797    Fixed positionid field to allow null to prevent errors on upgrade from 1.1 to 2.2
    T-11740    Fixed MSSQL error in dynamic audiences when selecting a Manager rule
    T-11344    Fixed RPL not marking activities as complete
    T-10737    MDL-37734 use prefetching workaround for MARS transaction problems