I never log out if I can help it, so I can't confirm the problem, but I will note that I got to the ATT front page (still properly logged in) with no problems less than a half-hour after you posted that.
EDIT: I just noticed -- the main menu along the left edge is severely reduced in size and options. Something is (as usual) going on again.
EDIT 2: Confirmed. I could not save at all because of "session information lost", and error message suggested logging out and logging back in again. I usually ignore and retry and that's enough, but after a half-dozen failed retries I went for the logout -- and ended up with the same cookies message. So... if the save failure is universal, and the recovery advice results in an inability to log in and be able to edit, then the entire wiki is read-only right now. Joy.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.
EDIT: I just noticed -- the main menu along the left edge is severely reduced in size and options. Something is (as usual) going on again.
EDIT 2: Confirmed. I could not save at all because of "session information lost", and error message suggested logging out and logging back in again. I usually ignore and retry and that's enough, but after a half-dozen failed retries I went for the logout -- and ended up with the same cookies message. So... if the save failure is universal, and the recovery advice results in an inability to log in and be able to edit, then the entire wiki is read-only right now. Joy.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.