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 Tue 08 Mar 2011 01:48:09 AM JST
gpg:                using DSA key 542C11C0EBD27418
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==