What are the functions of "Message Approving" and "Ranking"? How to use them?
"Message Approving" should list all posts in need of approval - that ties in with your other bug report, which I haven't looked into yet.
"Ranking" allows you to automatically assign fancies titles to users once they reach a certain number of posts. You can try that on your local installation by creating a new ranking with, say, a minimum of 10 posts and some arbitrary title, and then that title should appear underneath the user name once you have posted at least 10 times.