Hard-coded site URL in header

The site at http://thatcamp.org/planet also uses the theme -- it is
masked to look like just another page on
http://proceedings.thatcamp.org.

header.php

@@ -42,7 +42,7 @@ classDisable: '',
 
     <div class="container">
 
-        <a class="site-title" href="<?php echo home_url(); ?>">
+        <a class="site-title" href="http://proceedings.thatcamp.org">
             <img src="<?php bloginfo( 'template_directory' ); ?>/images/logo.png" alt="Proceedings of THATCamp">
         </a>