absurdoldbird - yes, that's the blog. It works at the 'home' page, but not for some of the posts. Take a look at http://edstevensdba.wordpress.com/2012/02/01/allocation-of-extents-in-multi-file-tablespaces/#respond.
timetheif - OK, I followed your link and found "To change the comment settings for a post or page you already published,(exactly what I want) open it for editing. In your Dashboard, go to either Pages or Posts, locate the one you want to edit, and click on its title. (done)
Then, locate the Discussion module on the edit screen" Maybe I'm losing it, but I don't find a "Discussion module on the edit screen" In fact, Firefox can't even find the word "Discussion" on that screen.