Changes 3.3.10:
* Fix searching DataTree elements (groups) if backend charset is different
  from interface charset
* Fix accessing IMAP ACLs that contain non-alphanumeric characters
* Avoid fatal errors when using DateTime with not properly configured PHP 5.3+
* Fix importing recurrence exceptions from vCalendar 1.0.
* Fix preferences management regression
* Fix conversion of all-day events and certain yearly recurring events for
  Funambol clients.
* Fix memcache cache regression.
* Fix SyncML page sometimes deleting more anchors than selected.

(adam)