I get an OpenID Authentication Error while leaving a comment.

What steps will reproduce the problem?
1. Filling the Openid field (or all the fields of the comment form)
2. Pressing the submit comment button.
3. Gettig the Livejournal openid authentification screen and accepting the
request (tried both for one time and forever).
4. retrned to blog with an error:

OpenID Authentication Error
We were unable to authenticate your claimed OpenID, however you can
continue to post your comment without OpenID:

5. Able to post a comment without an OpenID


What is the expected output? What do you see instead?
Expect to post comment with an OpenID.

Instead get an OpenID Authentication Error
We were unable to authenticate your claimed OpenID, however you can
continue to post your comment without OpenID:


What version of the product are you using? On what operating system?
WP 2.8.2 , openid 3.2.3, Mandigo theme
FF 3.5.1
Windows XP


Please provide any additional information below.
Did not modify OpenID plugin or WP, except added a line of code to show the
OpenID field, as suggested:

    <p><input type="text" name="openid_identifier" id="openid_identifier" />
<label for="openid_identifier"><small>OpenID URL (for example:
mactep.livejournal.com)</small></label></p>