That's most certainly not a bug in debian-archive-keyring. OTOH, just trying to remove various keyring packages and still expecting it to work is... interesting at best. It seems that there was a missing dependency somewhere ubuntu-keyring-ish, but given that the bug's dating back to 8.10 and was a single instance, I'm closing it.
** Changed in: debian-archive-keyring (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/335430 Title: package debian-archive-keyring 2008.04.16+nmu1 failed to install/upgrade: subprocess post-installation script returned error exit status 1 when Ubuntu-keyring is not yet installed -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs