For my wiki-farm I've been using this technique for clean URLs with Apache:
.htaccess Options FollowSymLinks RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)$ index.php/title=$1 [L,QSA]
LocalSettings.php $wgScriptPath = "/wiki"; $wgArticlePath = "/$1";
Same as detailed here: http://www.mediawiki.org/wiki/Manual:Short_URL#.htaccess_2
After upgrading to 1.11 viewing the pages still work, but when I attempt to edit a page it insists on creating and editing a new page called "Index.php".
Any ideas?