Errors

use_warnings

Pod::MinimumVersion, Pod::MinimumVersion::Parser, Pod::MinimumVersion::Report

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 02 Apr 2011 04:04:41 AM JST
gpg:                using DSA key 2C5302215F6ADD3A
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==