There is a thread going here about the possibility of closing comments on your posts. This isn't a bug, it is part of the blogging software. You can choose to not accept comments on your posts by uncheking the Accept Comments checkbox under the categories box on the right side of the Create Entry page. Since the comment link won't show up on posts with closed comments, prospective commenters should be vigilant when browsing the site so as not to accidentally recommend a post if they actually want to comment on it.