* (bug 31822) Error during upgrade due to output buffer reset in stdout
* (bug 31913) Special:MostLinkedTemplates had an incorrect GROUP BY clause
under Microsoft SQL.
+* (bug 31990) justify paragraphs pref adds extra space to category listing
=== API changes in 1.18 ===
* BREAKING CHANGE: action=watch now requires POST and token.
See the file UPGRADE for more detailed upgrade instructions.
-For notes on 1.15.x and older releases, see HISTORY.
+For notes on 1.17.x and older releases, see HISTORY.
== Online documentation ==