I have tried to reproduce it and do not run into any "Bad Signature" problem:
till@till-twist:~$ curl -O https://www.openprinting.org/download/printdriver/debian/dists/lsb3.2/Release.gpg % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 490 100 490 0 0 392 0 0:00:01 0:00:01 --:--:-- 393 till@till-twist:~$ curl -O https://www.openprinting.org/download/printdriver/debian/dists/lsb3.2/Release % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 5165 100 5165 0 0 5145 0 0:00:01 0:00:01 --:--:-- 5149 till@till-twist:~$ sudo gpg --keyring /etc/apt/trusted.gpg --verify Release.gpg Release gpg: WARNING: unsafe ownership on configuration file `/home/till/.gnupg/gpg.conf' gpg: Signature made Mi 10 Sep 2014 20:08:22 CEST using RSA key ID 4CFD1E2F gpg: Good signature from "OpenPrinting (OpenPrinting Key) <webmas...@openprinting.org>" gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. Primary key fingerprint: F889 7B6F 0007 5648 E248 B7EC 24CB F547 4CFD 1E2F till@till-twist:~$ sudo gpg --keyring /etc/apt/trusted.gpg --list-keys | grep 4CFD1E2F gpg: WARNING: unsafe ownership on configuration file `/home/till/.gnupg/gpg.conf' pub 2048R/4CFD1E2F 2013-02-27 pub 2048R/4CFD1E2F 2013-02-27 till@till-twist:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1365930 Title: OpenPrinting Release.gpg - bad signature. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/foomatic-db/+bug/1365930/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs