6.4.1 is a maintenance release that contains the following fixes and updates from version 6.4.0:
- Fixed a bug that allowed anonymous users to make their posts sticky.
- Made a change to force a default group if nothing was selected in the config file.
- Made some changes to make sure the scripts for updating profiles were being called from the profile editors.
- Changed one of the indexes on the posts table to help with speed.
- Fixed a bug with the cron/php/subscriptions.php file that wasn't allowing it to send out HTML emails properly.
- Fixed a bug in the categories page that wasn't showing the proper icons when there were new posts in the category.
- Fixed a bug that was showing the "Add Signature" box for users that weren't logged in.
- Changed the default search range to 1 week instead of all dates, since searching on all dates can slow the forums down.
- Fixed an issue that was preventing HTML emails from being sent out properly in some cases.
- Made a change so the jump to box defaults to the current forum.