I found a new bug when creating a comment to a reply in a discussion. If you press the "Comment" link you see that 10 characters are available which is more or less nothing. But the surprise comes when you enter more than 10 characters because then the display switched to "9990 characters left".
So the question for me is why does the initial information isn't like "10000 characters left". Was it a design idea to keep comments short? ;-)