[SOLVED] Older comments by author no longer highlighted after changing my username.

I've always read that it's a bad idea to use Wordpress's default "admin" username for your admin account, so I finally decided to change it today. So, I added a new user, set it as the admin, and then deleted the original default admin user while making sure to check the "Attribute all posts and links to" box and set it to the new admin user.

Everything went fine except for one thing... all of the comments I've already left on my blog are no longer being highlighted as comments from the author (me) always have. All new comments I'm leaving are working fine, though. It's just all previous comments that no longer highlight.

Any idea how to fix this?

Thanks in advance for any help.