[arch-general] python2-lockfile signature failure

Having just refreshed my desktop system with a clean Arch install, I am seeing a signature failure in the python2-lockfile package (dependency for duplicity). Is anyone else seeing this? `pacman --debug` isn't giving me any additional useful information that I can see. Where might I look next? Here's my output: $ sudo pacman -S duplicity resolving dependencies... looking for inter-conflicts... Packages (6): librsync-0.9.7-7 ncftp-3.2.5-4 python2-ecdsa-0.11-2 python2-lockfile-0.9.1-1 python2-paramiko-1.14.0-1 duplicity-0.6.24-1 Total Download Size: 0.01 MiB Total Installed Size: 6.13 MiB :: Proceed with installation? [Y/n] :: Retrieving packages ... python2-lockfile-0.9.1-1-any 11.9 KiB 0.00B/s 00:00 [########################################################] 100% (6/6) checking keys in keyring [########################################################] 100% (6/6) checking package integrity [########################################################] 100% error: python2-lockfile: signature from "Thorsten Töpper " is unknown trust :: File /var/cache/pacman/pkg/python2-lockfile-0.9.1-1-any.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] error: failed to commit transaction (invalid or corrupted package) Errors occurred, no packages were upgraded. 545 chris@vigilance tnet $ Cheers, -Chris -- Chris Tonkinson 610.425.7807 "Work as if you were to live a hundred years. Pray as if you were to die tomorrow." -Benjamin Franklin