Styling WordPress 2.7 author comments
Styling post author or registered user comments on your WordPress 2.7 blog is much easier than it was back in ol’ 2.6. The new wp_list_comments() template tag (or comment_class() if you’re doing it the hard way) automatically includes class names like byuser and bypostauthor for easy CSS styling. Slick.
See the official 2.7 theme migration guide for more details.
Test from a non-author