Log Message:
The major changes compared to the Horde version H3 (3.2.1) are:
* Escape item names in the object browser.
* Select db before queries in MySQL SessionHandler.
* Format messages sent through MIME_Mail in flowed text format.
* Fixes for SQL shares with split read/write databases, and  various fixes for \ 
hierarchical shares.
* Workaround broken IE behavior when downloading files with 8-bit  filenames.
* Fix storing of unlocked preferences set by hooks.
* Allow Horde memcache driver to use UNIX sockets.
* Fix parsing of addresses in headers when the RFC 2047-encoded personal part of \ 
the address contains address list delimiters.
* Fix generation of unique keys in configuration for machines too fast for \ 
microtime().
* Added group driver for Kolab.
* Added IMAP based preferences driver for Kolab.
* Fix missing timestamp variable in Horde SQL cache driver.
* Fix over-zealous preference caching when preferences are requested for a \ 
different user.
* Fix issue in Horde_Image that caused errors when performing  certain image \ 
operations immediately after an image had been cropped when using the \ 
ImageMagick driver.
The full list of changes (from version 3.2) can be viewed here:
http://cvs.horde.org/diff.php/horde/docs/CHANGES?r1=1.515.2.392&r2=1.515.2.413&ty=h