I just imported the key at http://bitcoin.org/jgarzik-bitpay.asc and then ran:

'$ gpg --verify'

... on the January 11, 2014 pgp signed text contained in the the first post of this thread. It just gave me the output:

gpg: Signature made Sat 11 Jan 2014 19:04:44 GMT using RSA key ID A2DB9CCA
gpg: BAD signature from "Jeff Garzik <jgarzik@bitpay.com>"

Is anybody else getting this problem?