The comment permalinks in the Regulus theme on the front page (see e.g. http://omtersaaist.wordpress.com/ :
and on the posting page itself use the comment identifier (in this case 259).
However, there are no named anchors or id tags in the produced html, so the permalink doens't jump to the specific comment...
(I've seen the same probleme on self-hosted WP Regulus sites as well, btw, so the error goes back to the author of the theme)