Errors

valid_signature
Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Sun 20 Feb 2011 08:35:26 AM JST
gpg:                using RSA key CFE76E27538DCAE7
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==