Comment Formatting Going Haywire

Sometimes the formatting of the comments section goes completely haywire, rendering all the threads under a certain post in italics and/or bold. I guess it's because the poster forgot to close a tag properly or something. As we have no way to edit posts, there are no ways to fix it after it's done.

The comments engine should sanitize all the code - not only because of formatting concerns, but for security reasons as well - and close all the tags left open within each post.