There is a pencil after edited comments. It made me even to ask a non-sense question, as I thought it would permit me to edit the comment.
I only noticed it was a way to indicate the comment had been edited when I leaved the mouse over it enough time to display its tooltip.
It seems to me it does not a great value to the reader about knowing whether the comment was edited or not; and even serves to confuse him/her. My suggestion is to remove it, or to draw a different icon.
May be orienting the pencil tip towards top would not make users think it is a edit button.
What do you think?