* Removed EnhancedChangesList::arrow(), sideArrow(), downArrow(), spacerArrow().
* Removed Xml::namespaceSelector(). (deprecated since 1.19)
* Removed WikiPage::estimateRevisionCount(). (deprecated since 1.19)
+* MYSQL: Enum item added to "major MIME type" columns.
+ Running update.php on MySQL < v5.1 may result in heavy processing.
==== Renamed classes ====
* CLDRPluralRuleConverter_Expression to CLDRPluralRuleConverterExpression