We have just finished successfully testing the Debian mediawiki 1.14.0-1 package on the 2009.02 release, and have updated our package archive to include it.
MediaWiki 1.14 is a new upstream release that is not considered a security critical release, so those interested in upgrading should do so manually:
apt-get update apt-get install mediawiki
Note: This upgrade requires the following manual modifications to be performed after installation.
1. Reconfigure the MediaWiki extensions location (why?)
ln -sf /usr/local/lib/mediawiki/extensions /usr/share/mediawiki/extensions
2. The FCKeditor extension is not compatible with MediaWiki 1.14, so it must either be updated manually or disabled in /etc/mediawiki/extensions.php