Arch Linux

Description:

linux upgrade to 3.7.4-1 fails due to invalid PGP signature.

Additional info:
* All packages installed are up to date, except linux which is still at 3.7.3-1
* Removed /etc/pacmand.d/gnupg and executed pacman-key --init: still no luck


Steps to reproduce:
* Run pacman -Syu

Here's the output:

$ sudo pacman -Syu
:: Synchronizing package databases...
core is up to date
extra is up to date
community is up to date
multilib is up to date
hawaii is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...

Targets (1): linux-3.7.4-1

Total Installed Size: 62,17 MiB
Net Upgrade Size: 0,00 MiB

Proceed with installation? [Y/n]
(1/1) checking package integrity [#############################################################################] 100%
error: linux: key "771DF6627EDF681F" is unknown
:: Import PGP key 7EDF681F, "Tobias Powalowski <tpowa@archlinux.org>", created 2011-07-18? [Y/n]
(1/1) checking package integrity [#############################################################################] 100%
error: linux: signature from "Tobias Powalowski <tobias.powalowski@googlemail.com>" is invalid
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.