Why does vBulletin use relative links?
 

All the internal links in the templates seem to be relative links rather than root or absolute links, e.g.
PHP Code:


rather than PHP Code:


or PHP Code:


Is there a reason relative links were chosen over root or absolute links? The reason I ask this is because relative linking makes it impossible to use templates in a subdirectory. If I want to use standard vBulletin templates with a custom add-on (e.g. PhotoPost), all the vBulletin templates must be modified, since the relative links will not work within the /gallery directory.