* HTMLForm mutators can now be chained (they return $this)
* A new message, "api-error-filetype-banned-type", is available for formatting
API upload errors due to the file extension blacklist.
+* jsMessage: Redesigned in Vector/Monobook as floating bubble with auto-hide.
=== Bug fixes in 1.20 ===
* (bug 30245) Use the correct way to construct a log page title.