[MarkFL]

I took the liberty of changing that for you...what I did was open the template "postbit.css" and to the following selector added the code in red:

.postbit .userinfo_noavatar .usertitle, .postbit .userinfo .usertitle, .postbit .userinfo_noavatar .rank, .postbit .userinfo .rank {
	font-size: {vb:stylevar small_fontSize};
	font-weight: bold;
	display:block;
	clear:both;
	color: #000000;
}