On the "Accounts" page, it says (for the past few days?)
Account Association Disabled
While the network is being migrated, account associations to Meta have been disabled.
I can't seem to find answers here or on Google.
closed as too localized by kiamlaluno, yhw42, jonsca, Toon Krijthe, Al E. Sep 11 '12 at 15:00
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The most recent blog entry states:
I would presume that at the completion of this, the migration will be complete.
EDIT: Account association is back. (: