It was brought to my attention by a petition signatory that there's a loophole in our signature confirmation process. Thanks to his sharp eye, we've changed the confirmation process to make it more foolproof.

An unfortunate side effect of this change is that anyone who hadn't confirmed their signature as of the time of the update now has bogus confirmation e-mails. They won't work.

We sent out replacement e-mails that should take care of the problem.

Thanks to Mark for pointing this out to us.