OpenID spec changes?

[OHTSUKA Ko-hei]

Hi,

I've been tested OpenID in LiveJournal, TypeKey, and videntity.org last
monthes.
At first, these sites cooperated pretty well, but these days, they can't
work together.
Only "Logging in videntity.org by liveJournal ID" works.

Why they become not to work together?
Is there any changes of specs?
I'm not good at English, so don't read all mails.
If someone know reason, please teach digest of reason to me.

Thanks for your kindness...

                                                     OHTSUKA Ko-hei