Some UI issues and recommendations.
1. The up/down arrows after a vote leave behind a clickable void. That means you can still click that void after you have voted. If you changed the visibility on .votelinks instead of the buttons this would get fixed. Though even better UX would be to have togglable up/down buttons ala stackoverflow and others.
2. Why not provide the favourite link directly on the comment instead of forcing an extra click and page load. If it's a UI clutter issue maybe consider adding star and flag UNICODE characters. Again, having togglable icons for the same would be nice.
3. The collapse icon would be better off on the left for improved UI consistency.
EDIT: UNICODE characters don't show in comment. Is this a bug? They show in the textarea while composing the comment.
EDIT2: Add the following User CSS using your preferred browser addon for a bit of cleanup.
.togg {
float: left;
margin-right: 5px;
}
.votearrow {
margin-bottom: 10px;
}