Sorry, the link wasn't meant to be followed, just visible.
This error is found using Firebug in Firefox. And it is just above the line of css code that it applies to with a link to the css document to the right of the code.
So the css is broken or dropped. but in another site with the exact same css it isn't broken. So if there was an image in the css, the image is in the correct folder, the permissions are correct but won't show up.