New features:
Add a option to draw a grid in the main book list (Preferences->;Look &; feel).
Edit book: Allow removing the currently highlighted tag (while keeping its contents) by pressing Ctrl+>;. You can also add a tool to do it via Preferences->;Toolbars.
Content server: When defining a color scheme for the in browser viewer allow specifying the link color as well as the foreground and background.
Edit book: Show a popup after a fix all html/beautify all files so the user can easily see what was changed, if needed.
Kindle driver: Create cover thumbnails on the device when transferring KFX format books.
Edit Book: Recognize numbers in image names in the 'Insert image' dialog.
Bug fixes:
Content server: Display custom comments field on the book details page in the same order as in the calibre GUI.
Edit book: Fix open image editors not being updated when image file is replaced.
Fix keyboard shortcuts for Edit book tools created from plugins not working.
PDF Output: Fix error when trying to convert books that do not specify a language in their metadata.
Browser viewer: Fix inability to open books that contain zero-byte stylesheets/images.
Improved news sources:
Boston Globe.
Newsweek.
Ambito and Ambito Financiero.
New York Times.
New England Journal of Medicine.
The Hindu Business Line.
Private Eye.
Le Temps.