In version 2.2 we’ve added support for FictionBook ebook format.
We’ve added support for PDF documents encrypted with Acrobat X.
In a rare case where printing looks different than display, you can now use “Print as image” compatibility option in print dialog.
For better viewing of manga comic books we now have a new command-line option: -manga-mode [1|true|0|false].
Finally, we’ve made many robustness fixes and improvements. Too small to describe them in detail but in aggregate they make a difference.