Unable to use blog address as openid on Blogger, but …/author/Michael works

Hiya!

I just installed OpenID on my single-user WordPress blog at https://michael.tyson.id.au and set my account as the blog owner, hoping to use https://michael.tyson.id.au as my OpenID identity.

I tested it at https://openidenabled.com/resources/openid-test/checkup and it passed.

However, trying it at a Blogger test page – https://www.blogger.com/comment.g?blogID=1504961872775281277&postID=1449318644434822126 – I receive an error “Incorrect OpenID url”

On a whim, I tried https://michael.tyson.id.au/author/Michael and it worked perfectly.

Any ideas? Status info below.

Status information: All Systems Nominal (Toggle More/Less)

[INFO] PHP version: 5.2.0
[INFO] PHP memory limit
[INFO] Include Path:
/backup/home/tysonid/public_html/michael/wp-admin
/usr/lib/php
/usr/local/lib/php
[INFO] WordPress version: 2.6.3
[INFO] PHP OpenID Library Version: 2.1.2
[INFO] MySQL version: 4.1.21
[INFO] WordPress’ table prefix: wp_
[OK] Curl Support: Version 7.12.1. SSL: OpenSSL/0.9.7a. zlib: 1.2.3. Supports: ftp, gopher, telnet, dict, ldap, http, file, https, ftps.
[OK] Big Integer support: BCMath is installed (though GMP is preferred).
[INFO] Plugin Revision: 518
[INFO] Plugin Database Revision: 24426
[INFO] XRDS-Simple: XRDS-Simple plugin is installed.
[OK] Overall Plugin Status