+ - Add CEST and MEST (non-standard) timezone codes for +0200.
+ - Add support for SpamAssassin's X-Spam-Status header (#1589520).
+ - Added plugin on/off switch, which completely disables all plugins
+ (optionally for one named user, otherwise for all users).
+ - Security: close cross site scripting vulnerability in draft, compose
+ and mailto functionality [CVE-2006-6142].
+ - Security: work around an issue in Internet Explorer that would guess
+ the mime type of a file based on contents, not Content-Type header.
+ - Security: Multiple IE cross site scripting issues related to the
+ generous parsing of the words 'expression' and 'url' by IE.
+ - Security: Removing @import when sanitizing html mail.
+ - Redesigned plugin hook system. do_hook_function() has been removed
+ and do_hook() now emulates do_hook_function()'s return value and
+ also has its plugin arguments passed by value, etc.