You need font awesome for this.
Now edit your EXTRA.css and add
Code:
body .node .forumNodeInfo.unread .nodeIcon, body .node .categoryForumNodeInfo.unread .nodeIcon,
body .node .forumNodeInfo .nodeIcon, body .node .categoryForumNodeInfo .nodeIcon,
body .node .linkNodeInfo .nodeIcon,
body .node .pageNodeInfo .nodeIcon {
background-image: none;
}
.node.node .forumNodeInfo .nodeIcon:after, .node.node .categoryForumNodeInfo .nodeIcon:after
{
font-family: "FontAwesome";
font-size: 34px;
content: "\f009";
color: @primaryLighter;
padding: 4px;
}
.node.node .forumNodeInfo.unread .nodeIcon:after, .node.node .categoryForumNodeInfo.unread .nodeIcon:after
{
font-family: "FontAwesome";
font-size: 34px;
content: "\f009";
color: #ea2e49;
padding: 4px;
}
.node.node .pageNodeInfo .nodeIcon:after
{
font-family: "FontAwesome";
font-size: 34px;
content:"\f016";
color: @primaryMedium;
padding: 4px;
}
.node.node .linkNodeInfo .nodeIcon:after
{
font-family: "FontAwesome";
font-size: 34px;
content: "\f0a9";
color: @primaryMedium;
padding: 4px;
}