See v4.13.0's changelog for a majority of other changes.

ADDITIONS

#946, fixes an issue where sometimes a thread created at a close enough time to another would be loaded instead of the proper thread.
The rotate image option has been moved to be a toolbar item for static images.
If a watched thread is a sticky, it will have the pinned icon added to the title and the usual post/image limit bold/italics on the unread count won't be applied.
Fixes a reported issue with site deletion; Context objects should not be dependency injected unless known to be the correct one (Application versus Activity).