This is my solution to a request for a WordPress hack from the support forum:
http://wordpress.org/support/topic/71499?replies=2#post-374824
Edit /wp-includes/comment-functions.php
Assuming you have WP v2.0.2, modify line 378 which is:
$return = "$author";
to:
$return = "$author";
I just tested it and it works. If you don’t have v2.0.2 just search for that line of text.
Just FYI, this modifies the get_comment_author_link() function which is called from your theme file, so if you swap themes this should still work, but if you upgrade WordPress to a new version after this hack then you will have to reapply the hack I guess.
