* (bug 41733) Hide "New user message" (.usermessage) element from printable view.
* (bug 39062) Special:Contributions will display changes that don't have
a parent id instead of just an empty bullet item.
+* (bug 37209) "LinkCache doesn't currently know about this title" error fixed.
* wfMerge() now works if $wgDiff3 contains spaces
+ * (bug 43052) mediawiki.action.view.dblClickEdit.dblClickEdit should trigger
+ ca-edit click instead opening URL directly.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.