$root_url not working?

[mjwalsh]

The front page seems okay for example:

http://loftyporn.com/category/4/1/Asian.html

If you go here the root url isn't working on the thumbnail links, and a few other things as well.

This isn't the first time I've seen this problem I had the same problem on another site and just went through and manually replaced $root_url with my site url but that's not ideal, now my sitemaps are broken as well as my thumbnail links. Any ideas?

I have edited the config but nothing changed like this. The stylesheet is not very good at going recursive as well, as you can see when you go to a specific category.