Few things I've noticed, 'scuse me if already discussed:

• announcements on the front page - dead spot. Nothing draws the user attention on a quick glance. It should be more visible IMHO.
• Username and Serch fields - text should be auto selected or disappear on focus like the password field.
• The new style wiki main menu is broken, looks like a missing image/sprite (FF35b).
• The gray elipsoid in the right menu can be divided to two elements to support the vertical resizing of the items (like when on two rows).

Keep up the good work.