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.
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The most recent blog entry states:
This Saturday, October 23rd, starting at about 2 PM Pacific, we will be migrating all of our primary sites from the Corvallis, OR datacenter to the New York, NY datacenter.
Please be advised that this is a major move, and while we will do everything we can to prevent major service interruptions (largely with a read-only site mode we’re introducing), there may be a few hours of unavoidable downtime.
I would presume that at the completion of this, the migration will be complete.
EDIT: Account association is back. (: