New Features
Allow creation of rules to convert arbitrary identifiers into clickable links in the book details panel (Prefrences->Look & Feel->Book details)
Tag mapper: A new rule type 'split' allows you to easily split tags on a character
Make the shutting down message an overlay so it is less disruptive
Allow right clicking on Virtual Library tabs to edit/delete the virtual library.
Closes tickets: 1568306
Tag mapper: Add a button to edit the list of tags in a tag mapper rule using the tag editor dialog.
Closes tickets: 1568376
Bug Fixes
Conversion: Fix the obsolete HTML align=center markup (produced by Microsoft Word) not working for tables.
Closes tickets: 1569583
Font subsetting: When font-variant: small-caps is used include the capital letters as well, in case either the font or the renderer do not support OpenType smcp.
Closes tickets: 1568555
Font subsetting: Implement support for text-transform.
Closes tickets: 1568555
Fix the target book entry in the book list not being refreshed after merging books. Only matters if you have a column based on book formats.
Closes tickets: 1568091
E-book viewer: Fix a link that has some text along with a superscript/subscript being incorrectly detected as a footnote link
Fix device detection on windows failing if the registry entries for the device contain a very long item.
Closes tickets: 1567569
Edit Book: Fix an extra colon being added when setting the 'notes' semantic
Ensure that author folder names are never windows reserved names
E-book viewer: When displaying an EPUB 3 document that uses epub:switch to provide a fallback for MathML content, prevent both the MathML and fallback from being shown together.
PDF Output: When displaying an EPUB 3 document that uses epub:switch to provide a fallback for MathML content, prevent both the MathML and fallback from being rendered together.
Fix exception in custom column preferences when the column lookup key is changed
Catalog generation: Do not crash is a book in the library has no uuid.
Closes tickets: 1565242
New news sources
Kitekinto by pofa
Improved news sources
Brand Eins
Handelsblatt
tyzden
Newsweek
http://calibre-ebook.com/