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I have not visited stackoverflow and related sites for some months (shame on me) and meanwhile either SO or my OpenID provider changed their software.

I have troubles logging in, because the URL I gave to SO (dnoa.userSuppliedIdentifier) was, but they authenticate me (openid.identity) as

I get "This is an OpenID we haven't seen on Meta Stack Overflow before" error. I was stupid enough not to register an alternate OpenID account, so account recovery does not help me. I did not have a very high reputation, but I like my nickname too much, so if there is any idea how could I get it back, please advise.

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up vote 1 down vote accepted

Usernames on Stack Overflow are not unique; you can re-use your old name if you wish to register a new account (but if you email they might be able to do something; in either case you can register an account now so you can start using SO right away and they will merge them).

Anyways I guess one of the downsides of the OpenID technology is that if your OpenID provider goes down or changes you're screwed!

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Great idea, thanks. Maybe it was not only me who has problems with my account and there is some generic solution that helps them all. – wigy Apr 10 '10 at 20:16
@Kop: you're not screwed; a moderator can add a new OpenID for you if your provider stops working and you don't have an alternate set up. – Ether Apr 10 '10 at 20:32
@Ether: I was talking in general. OpenID is meant to be used as a "one login, one password" for all the websites that support it. Other websites may not be so nice. – Andreas Bonini Apr 10 '10 at 21:14
I guess one of the downsides of e-mail technology is that if you e-mail provider goes down or changes your're screwed. If you consider e-mail "business critical", you probably want to make a solid contract with your e-mail provider or do the e-mail hosting yourself. Two similar options are available for those who consider OpenID business critical ;) – Jørn Schou-Rode Apr 14 '10 at 9:16

Interesting, this appears to be a global change on their end, so I did this across all sites:

update Users
set OpenIdAlt = 
   dbo.RegexReplace(OpenId, 'http://(.+)\.openid\.org/', '$1')
  OpenId like '' 
  and OpenIdAlt is null 

That should sort any users who have only this form of OpenID as the primary.

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Mail with your user details and another OpenID URL. If you can convince them that you are you, they'll fix you up!

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Thanks for the idea, I will try it. – wigy Apr 10 '10 at 20:14

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