relatedlinks URLs should be relative to the drupal root

What is stored in field url of relatedlinks table is not drupal path but path relative to server root.
If the web site is under a directory, for example http://mysite.com/dir, all url in relatedlinks table will start by /dir, what is not a part of the drupal path and they will be broken if the site's directory changes.
In function _relatedlinks_filter, url are generated by : $urls[] = ''. check_plain($link['title']) .'';
Don't the l() function of drupal should be used ?