Thank you, Colin! I checked updated signatures for all of the *SUMS files (MD5SUMS, SHA1SUMS, SHA256SUMS) - they all has good signatures now.
Here is the new output of gpg command: $ gpg --verify SHA256SUMS.gpg SHA256SUMS gpg: Signature made Sat May 8 14:58:57 2010 EEST using DSA key ID FBB75451 gpg: Good signature from "Ubuntu CD Image Automatic Signing Key <cdim...@ubuntu.com>" 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: C598 6B4F 1257 FFA8 6632 CBA7 4618 1433 FBB7 5451 This bug can be closed now. -- Bad gpg signature of Lucid DVD iso images https://bugs.launchpad.net/bugs/576152 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs