New Features
Metadata review dialog: Automatically insert series number when selecting a series from the completion dropdown. Also if the user does not specify a series number, use 1 as the default, instead of not setting the series.

Bug Fixes
Fix regression that broke error reporting for save to disk for books that contain no formats.
Metadata download: Fix metadata download not working for titles that contain a apostrophes in languages other than English.
Fix deleting a book from both the library and the device causing the next selected book to be incorrect, when the library is sorted by the On Device column.
FB2 Output: Fix generation of FB2 sections based on a multi-level Table of Contents in the input document.
Tolino Shine driver: Fix option to swap main memory and SD card not working on OS X.
FB2 Input: Workaround for broken FB2 files produced by convertonlinefree.com.
OS X: Workaround for OS X installs that have incorrect permissions set on their home directories. calibre will now no longer refuse to start on such machines.
MOBI Input: Dont crash on corrupted JPG images.
Fix column icons not displaying for custom comments type columns
Metadata review dialog: Show a confirmation for the 'Reject all remaining' button.

New news sources
OSEL.cz by spacekpe
Courier Mail by Krittika Goyal

Improved news sources
Nikkei News