User blog comment:Dopp/Technical Update: August 9, 2011/@comment-26686429-20110809233948/@comment-26686429-20110810144626

Highlights are added manually at MediaWiki:Wikia.css.
 * Because of this, I maintain my own version so that it shows up in monobook, if you want to see Grunny's comments highlighted, you can add:

@import url("http://community.wikia.com/wiki/User:Randomtime/StaffHighlight.css?action=raw&ctype=text/css"); to your own personal CSS (or copy the lines from the bottom of User:Randomtime/StaffHighlight.css)