Is there anyone intimately familiar with the comment-functions.php file--specifically, the get_comment_author_link() function? I cannot figure out why the $return is limited to passing only two attributes in the ANCHOR tag.
You can pass an HREF and a REL as it was set up originally. You can pass an HREF and a TITLE. You can pass an HREF and a CLASS. You can pass pretty much any two ANCHOR elements you want (as far as I can tell,) but once you add a third or fourth, such as HREF, TITLE, and CLASS, you start getting errors.