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?