New Features

* Decrease startup time for large libraries with at least one composite custom column by reading format info on demand
* When automatically deleting news older than x days, from the calibre library, only delete the book if it both has the tag News and the author calibre. This prevents accidental deletion of books tagged with News by the user.
* Driver for Infibeam Pi 2
* Add a Tag Editor for tags like custom columns to the edit metadata dialog

Bug Fixes

* E-book viewer: Fix regression in 0.8.35 that caused viewer to raise an error on books that did not define a language
* Content server: Fix grouping for categories based on custom columns.

Closes tickets: 919011 [External link]
* Edit metadata dialog: When setting the series from a format or via metadata download, ensure that the series index is not automatically changed, when closing the dialog.

Closes tickets: 918751 [External link]
* When reading metadata from Topaz (azw1) files, handle non ascii metadata correctly.

Closes tickets: 917419 [External link]
* CHM Input: Do not choke on CHM files with non ascii internal filenames on windows.

Closes tickets: 917696 [External link]
* Fix reading metadata from CHM files with non-ascii titles
* Fix HTML 5 parser choking on comments
* If calibre is started from a directory that does not exist, automatically use the home directory as the working directory, instead of crashing
* Fix iriver story HD Wi-Fi device and external SD card swapped

Closes tickets: 916364 [External link]
* Content server: Fix ugly URLs for specific format download in the book details and permalink panels
* When adding FB2 files do not set the date field from the metadata in the file

New news sources

* Tweakers.net by Roedi06
* Village Voice by Barty
* Edge.org Conversations by levien
* Novi list - printed edition by Darko Miletic

Improved news sources

* OReilly Premuim
* Variety
* Blic
* New Journal of Physics
* Der Tagesspiegel