Kaynak kodlarına bakılırsa css düzenlemesini kendi yapmış. Sanırım eklentide kendine ait

.forumkafa {
	font-weight: bold;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #6CF;
}
.uyemkafa {
	font-weight: bold;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #F00;
}
.linkzkafa {
	font-weight: bold;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 14px;
	color: #FFF;
}
.son_basliklar {
	padding: 3px 6px;
	border-top: 1px solid #36436D;
	border-right: 1px solid #36436D;
	border-left: 1px solid #36436D;
	border-bottom: 0px solid #36436D;
	color: #CCC;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 13px;
}

.son_basliklar_end {
  padding: 3px 6px;
  border-top: 0px solid #36436D;
  border-right: 1px solid #36436D;
  border-left: 1px solid #36436D;
  border-bottom: 1px solid #36436D;
  color: #FFF;
  font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
  font-size: 13px;
}

.basliksx {
	font-size: 16px;
	color: #999;
	text-align:center;
	font-weight: bold;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
}