You can click on the Google or Yahoo buttons to sign-in with these identity providers,
or you just type your identity uri and click on the little login button.
please read ticket information.
Should be reopen now. The problem is still in 3.6.
this is an indexer "bug". Fixed.
Ticket #342670 - latest update on 2010/02/23, created on 2009/04/07 by Arthur Lutz