Log Message:
The major changes compared to IMP version H3 (4.3.2) are:
    * SECURITY: Escape output in message.php, pgp.php and smime.php
    * Several bugfixes and minor improvements

The full list of changes (from version 4.3.2) can be viewed here:

http://cvs.horde.org/diff.php/imp/docs/CHANGES?r1=1.699.2.367&r2=1.699.2.376&ty=h