GnuPG signature check failed on qpdf_2.1.5-1~bpo50+1_armel.changes gpg: Signature made Tue Aug 10 16:43:13 2010 CEST using RSA key ID 76E2AC7B gpg: Can't check signature: public key not found (Exit status 2) qpdf_2.1.5-1~bpo50+1_armel.changes has bad PGP/GnuPG signature! Removing qpdf_2.1.5-1~bpo50+1_armel.changes, but keeping its associated files for now. Greetings, Your Debian queue daemon