i think this is nice

src/client/js/components/PageComments.jsx

@@ -161,7 +161,7 @@ class PageComments extends React.Component {
                       <div className="col-xs-offset-6 col-sm-offset-6 col-md-offset-6 col-lg-offset-6">
                         <Button
                           bsStyle="primary"
-                          className="fcbtn btn btn-outline btn-xxs"
+                          className="fcbtn btn btn-outline btn-rounded btn-xxs"
                           onClick={() => { return this.replyButtonClickedHandler(commentId) }}
                         >
                           Reply <i className="fa fa-mail-reply"></i>