Errors

use_warnings

Statistics::Contingency

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 09 Jun 2013 12:41:45 PM JST
gpg:                using DSA key 82BBCC04B7EF9476
gpg: Can't check signature: No public key