Errors

use_warnings

JSON::Hyper, JSON::Hyper::Link

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Fri 12 Oct 2012 04:30:45 PM JST
gpg:                using DSA key CEBF81286A2A7D39
gpg: Can't check signature: No public key