We have just released build 3.9.57. Changes to the previous build are as follows:
- various small bug fixes
- added import / export of Outlook holiday files (extension .hol)
- Holidays are marked accordingly in the calendar
- vast speed improvements on checking the local cache against IMAP folders - on large folders this can be 30 times faster or even more!
- faster AJAX communication between frontend and server - when PHP has been compiled with GZip support
Therefore you have to activate the "use bandwidth saving compression" switch in the Config interface.
Unfortunately Internet Explorer still has problems with the new interface. Other browsers such as Firefox, Safari or Opera are not affected.
This build is available through the usual sources - AutoUpdate or download of a build suitable to your needs.

