I just noticed these very handy links on my achievements dropdown:
Yay! I thought. This looks really useful! It's always a pain to get to the privileges page by going via the help centre.
Only problem is, this screenshot was taken in chat, the only part of SE where there aren't "privileges" and "badges" pages. (The links redirect to http://chat.stackexchange.com/help/privileges and http://chat.stackexchange.com/help/badges, both of which give me "Page Not Found".) And when I look at my achievements dropdown on any main site, i.e. a place where those links would actually take me somewhere useful, they don't appear. I checked this on one site where I'm a moderator; one where I'm not a mod but have all rep-based privileges; and two sites (one graduated, one beta) where I don't yet have all the privileges. Nix on all of them.
Those links should either appear on the dropdown from main sites too (preferable) or not appear at all (since they're certainly useless in chat, the only place where they currently appear).