While trying to fix some of the formatting on the SEO Black Hat blog we made the mistake of fudging with the Database rather than the CSS.
The thought was We just need to remove certain tags from certain places and everything will be fine. We were wrong. The correct approach is to change the CSS make the data display how you want.
Lesson learned.
Most of the old posts now have formatting problems. Fortunately we have a backup (you do always make a backup before you play with things - right?) and the old posts will be restored to form in the next 24 hours.