Release notes
From MediaWiki.org
This page links to the various release notes available at MediaWiki.org. Release notes for point releases are included with the main release notes (e.g. release notes for 1.7.1 are added to the release notes for 1.7)
Release notes for earlier versions of MediaWiki that are not listed below, are available in the distribution package, and also on SourceForge, though you may need to do a bit of digging.
