Lots of bugs were fixed in this release. The derby internal database was replaced by a PostgreSQL instance. Conversation grouping is now done with the Cyrus RFC5256 implementation.
The drag-and-drop style has been changed to mimic the Gmail one. Email
address searching is improved. obm-sync 2.2.7+ is now used for contact
searches and user settings retrieval. Sieve filters management is
available when running in GWT hosted mode, but is disabled in production
builds.
This releases has major stability fixes when moving email messages. It adds drag and drop support for moving conversations, email conversation previews, templates and starred email support, and many user interface fixes. For the first time, Debian packages of a complete OBM + MiniG architecture are available.