As you have noticed already, the backround to the wiki has changed. The reason is a new Wikia update that requires more pixels in the backround. The current backround (behemoth at Canada's Wonderland) was just added by our newest admin, Lachlan. Here, we can discuss the backround we will have.
Personally, I like the backround. But I think we should use a real image.
Update: You can view these changes by adding ?wikiagrid=1&wikiafullheader=1 to the adress bar of the main page or an article!