User blog comment:DaNASCAT/Technical Update: September 25, 2012/@comment-3388044-20120928102501/@comment-5209426-20120930200843

Those pages are special, the site knows they aren't articles so it doesn't give you the toolbar. You obviously shouldn't be trying to put links or images in a JS/CSS file.

Of course, the CSS is broken if you switch to wide mode because Wikia's CSS doesn't handle the case where there are no toolbar buttons properly. You have to stick this in your global.css to fix it: min-height: 39px; /* Wikia's CSS gives #EditPageRail height:39px!important */ } This has been broken for months, I'm sure its been reported plenty of times and, as you can see, is trivial to fix.
 * 1) EditPage.mode-source.editpage-sourcewidemode-on #EditPageToolbar {