Thank you for pointing this out. I've just applied the fix to the forum/includes/vba_links_class.php file in the download package here, so if you will download the files again and update that one on your server, that should take care of the issue.
Or if you would rather apply the fix manually, just look in the file for this line:
And replace with this:
$this->check_cat_perms($permvar, $this->_link, true);
if (!$this->check_cat_perms($permvar, $this->_link, false))