The preious entry describes Associations which the the feature pushed to domain today. Currently there is no application interface for setting associations, but the API is available, and the Firefox extension does allow it (sorry, the xpi is not packaged atm).
Styles were adjusted accordingly, and the images section of media pages was also adjusted for a more fluid look. The secaol column on media pages was also lightly modified for conformity. Most pages should validate xhtml1.1 aside from the random img missing alt attributes.
Still, an important item is sliming down the CSS, but I am no designer, so it will have to wait.