Yea, it is similar a Facebook "like" Here it the little circle with the up sign inside. See, I will upvote this reply. Any way, it looks like someone down voted your comment on my post. It was not me, but someone else who didn't like it I guess. I don't really mind, but you did not "like" = up vote my article.
@streetstyle

Edit: I am now #15 @foxkoit