Allow OpenID based commenters to add their thoughts via comments on your WordPress blog. This plugin is not an OpenID server.
This plugin (by way of the included SimpleOpenID class) uses cURL to communicate between the plugin and the site hosting the OpenID server. Behind the scenes, there have been some decisions made about how cURL operates in certain situations. When cURL goes to a secure site (one that begins with the protocol
https://) cURL has to decide if the url is valid, so cURL, at the least, looks at the site's server's secure certificate and compares the information found on it to the entered url. If these match, cURL decides thing are okay and the communication continues. In this situation,
https://www.my-site.domain.com is NOT the same as
https://my-site.domain.com. If the site's server's secure certificate has been set up as
https://www.my-site.domain.com, cURL will use that as the 'valid' url and reject using other urls, for your safety. Additionally, cURL can complain and fuss a bit if the secure server's certificate is expired.