If the current request is a AJAX we need to fix the paths. We need to get the root path based on the Referer, so we can use the generated URLs in the template of the Referer. If we do not generate the relative path based on the Referer, but based on the currently requested URL, the generated URLs will not point to the intended locations: Referer desired URL desired relative root path memberlist.php faq.php ./ memberlist.php app.php/foo/bar ./ app.php/foo memberlist.php ../ app.php/foo app.php/fox ../ app.php/foo/bar memberlist.php ../../ ../page.php memberlist.php ./phpBB/ ../sub/page.php memberlist.php ./../phpBB/ PHPBB3-12099