When I click on my name at top of http://stackexchange.com, I get a Page Not Found message.
I have problems with logging in as I have used My OpenID and switched to Google later. I tried to clear cookies several times, disassociate and associate accounts on different sites, as some sites didn't see some other accounts. After one such round of clearing cookies I noticed I have the page not found problem.
The reason was that My OpenID had some temporary problem and I could not get in. I do not want to use My OpenID, only Google.