characters changed in a revision is now suppressed if no text would follow.
* (bug 18704) Add a unique CSS class or ID to the tagfilter table row at RecentChanges
* (bug 33564) transwiki import sometimes result in invalid title.
+* (bug 35572) Blocks appear to succeed even if query fails due to wrong DB structure
=== API changes in 1.20 ===
* (bug 34316) Add ability to retrieve maximum upload size from MediaWiki API.