I got logged out of meta at about 17:02, and from SO at about 17:20 local time. I was then immediately logged back in.
I was intrigued by the new login UI, and wanted to play with it. However, as soon as I click "log out", I get logged back in again!
Is there a way to just not be logged in? Do I need to use a different computer, or to delete cookies?
Alternatively, did I miss the announcement or blog post about this new feature?
I just tried again, this time clicking the "Log out Everywhere" button. It didn't even log me out, as far as I could see. After two or three more random clicks, I found myself logged out, and I stayed logged out. This included, BTW, a 404 error on a URL with a
?returnUrl=%2f or something like that.
Pretty new UI, but you've god a few bugs here.