Hi, the problem was that you have unopened divs. Every time you have an <div>, there should be a </div> to match it at the end of the area. If you don't have that, you may get odd text showing up that should be hidden.
Have a look at the fixes Rappy did on fusionfall.wikia, and you should be able to find similar issues on other pages you've seen this.
Sannse, on this wiki, some of the newer features that were recently added to Wikia are not there. Such as the "Add video" icon in source mode and the "Promote" feature within the Admin dashboard. Am I missing something to get these features?
We are in the process of upgrading all the wikis, and some haven't been done yet. You can tell which by going to Special:version on that wiki and looking for the "Installed Software" line. If it still says "MediaWiki 1.16.5", then it's not done yet. The new features will be there once it's upgraded (you may be able to ask for it to be bumped up the list on Community Central
First thing to try is clearing your cache and cookies (see Help:Bypass your cache for help on this). If that doesn't help, then please take a screenshot and send it to us via Special:Contact, and we'll look in to it.