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 Sat 11 Sep 2010 08:14:19 PM JST
gpg:                using DSA key 7A90BC7B6252F1E7
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==