People who are not members of a blog, when preparing to comment, are allowed to select how they wish to authenticate, and be identified, subject to the options selected by the blog owner.
- Using a pseudonym / URL.
- Using An OpenID.
- Using a Google id.
This appears to be yet another problem with a blocked script. One successfully diagnosed problem involved a Kaspersky product. The solution, in that case, was to whitelist "www.google.com/friendconnect".