Comment 12 for bug 644824

If the above process doesn't clarify what is going on, we can trash the OpenID -> LPAccount mappings in the Launchpad database. :

DELETE FROM OpenIdIdentifier USING Person WHERE OpenIdIdentifier.account = Person.account AND Person.name='cschluti';

Next time people log on, the OpenIdIdentifier will be mapped to the LPAccount with a matching email address.