Thread:Kirkburn/@comment-8014223-20150820001414/@comment-126761-20150827174050

Ah, I just realised why: the older code was still being called by Wikia.css (the one that's specific to the main Wikia skin) - Common.css is not loaded on the main Wikia skin on your community.

I've just copied the code into http://transformersprime.wikia.com/wiki/MediaWiki:Wikia.css, which means it should now properly start taking effect.