Thanks for the Google Plus author link.
My problem is that Google's Structured Data Testing Tool finds that my site's home page (The Editor's Blog) "does not contain authorship markup." I tested a handful of other pages and posts from my site and there's no problem--authorship is working for them. It's just the home page that doesn't show the author markup.
Is that a glitch or had you intended that? Is there something else I should try? Thanks.