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 Mon 04 Apr 2011 11:03:22 AM JST
gpg:                using DSA key 765B4473C6A2C9B9
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==