+* $wgImportSources can now either be a regular array, or an associative map
+ specifying subprojects on the interwiki map of the target wiki, or a mix of
+ the two. Existing configurations will still work.
+* Users must be able to edit through a page's protection to be able to delete it.
+* The default thumb size ($wgDefaultUserOptions['thumbsize']) is now 300px, up from
+ 180px. If you have altered the number of entries in $wgThumbLimits for your wiki, you
+ may need to adjust your default user settings to compensate for the index change.