Comment editing adds html tags

I remember how WP v2.0.5 changed apostrophes to slashes, and that was fixed in the next version. Now, I’m using v2.2.1 and I’m encountering another problem with comment editing.

I hope someone can try this with their setup to see if it isn’t just me. What happens is that when a comment is edited three times, html tags begin to appear. The more times it is edited after that third time, the more tags will appear.

For instance, editing a one-paragraph comment three different times produces the <p> and </p> tags around it on the displayed comment, not in the editor but on the actual display page. Comments with more than one paragraph and/or have formatting produce even more unwanted tags.

Is this just me, or are others having this problem, too?