[arch-general] Arch install broken by invalid signatures (anthraxx) using 201610 iso

[David C. Rankin]

All,

  Attempting an arch install tonight, and I get the following at pacstrap /mnt

:: Proceed with installation? [Y/n]
:: Retrieving packages...
 krb5-1.13.7-1-x86_64                       1100.1 KiB  1405K/s 00:01
[######################################] 100%
 libpsl-0.16.1-1-x86_64                       49.8 KiB  3.74M/s 00:00
[######################################] 100%
(155/155) checking keys in keyring
[######################################] 100%
(155/155) checking package integrity
[######################################] 100%
error: krb5: signature from "Levente Polyak (anthraxx)
<levente at leventepolyak.net>" is unknown trust
:: File /mnt/var/cache/pacman/pkg/krb5-1.13.7-1-x86_64.pkg.tar.xz is corrupted
(invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n]
error: libpsl: signature from "Levente Polyak (anthraxx)
<levente at leventepolyak.net>" is unknown trust
:: File /mnt/var/cache/pacman/pkg/libpsl-0.16.1-1-x86_64.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.
==> ERROR: Failed to install packages to new root

  What was this caused by? I had to boot from the 10/2016 iso. Is it a change
in signatures since then? I'll download a new iso and try, but I'd be
surprised if an iso less than 5 months old no longer works?

-- 
David C. Rankin, J.D.,P.E.