pacman-unknown-trust-error

[root@archy ~]# sed -r '/^( *#|$)/d' /etc/pacman.conf
[options]
HoldPkg     = pacman glibc
SyncFirst   = pacman
Architecture = auto
CheckSpace
[testing]
Include = /etc/pacman.d/mirrorlist
[core]
Include = /etc/pacman.d/mirrorlist
[extra]
Include = /etc/pacman.d/mirrorlist
[community-testing]
Include = /etc/pacman.d/mirrorlist
[community]
Include = /etc/pacman.d/mirrorlist
[root@archy ~]# . funcs
[root@archy ~]# pacman-update
:: Synchronizing package databases...
 testing is up to date
 core is up to date
 extra is up to date
 community-testing is up to date
 community is up to date
[root@archy ~]# pacman-upgrade-all-preview
:: Starting full system upgrade...
testing/glib2-2.30.1-1
extra/nettle-2.4-1
extra/gnutls-3.0.4-2
community/go-1:r60.3-1
testing/gtk-update-icon-cache-2.24.7-1
testing/gtk2-2.24.7-1
extra/vim-runtime-7.3.338-1
extra/gvim-7.3.338-1
testing/libltdl-2.4.2-1
extra/imagemagick-6.7.3.1-1
testing/initscripts-2011.10.2-1
testing/jack-0.121.3-2
testing/krb5-1.9.1-5
testing/libevent-2.0.15-1
extra/libpulse-1.0-4
testing/libtool-2.4.2-1
core/man-pages-3.35-1
community/mplayer2-2.0-15
testing/openssh-5.9p1-4
extra/rhino-1.7R3-1
extra/xf86-video-vesa-2.3.0-7
[root@archy ~]# pacman-upgrade-all
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...

Targets (21): glib2-2.30.1-1  gnutls-3.0.4-2  go-1:r60.3-1  gtk-update-icon-cache-2.24.7-1  gtk2-2.24.7-1  gvim-7.3.338-1  imagemagick-6.7.3.1-1  initscripts-2011.10.2-1
              jack-0.121.3-2  krb5-1.9.1-5  libevent-2.0.15-1  libltdl-2.4.2-1  libpulse-1.0-4  libtool-2.4.2-1  man-pages-3.35-1  mplayer2-2.0-15  nettle-2.4-1
              openssh-5.9p1-4  rhino-1.7R3-1  vim-runtime-7.3.338-1  xf86-video-vesa-2.3.0-7

Total Installed Size:   212.09 MiB
Net Upgrade Size:       -1.18 MiB

Proceed with installation? [Y/n]
(21/21) checking package integrity                                                                     [#############################################################] 100%
error: glib2: signature from "Ionut Biru <ibiru@archlinux.org>" is unknown trust
error: nettle: signature from "Andreas Radke <andyrtr@archlinux.org>" is unknown trust
error: gnutls: signature from "Andreas Radke <andyrtr@archlinux.org>" is unknown trust
error: gtk-update-icon-cache: signature from "Ionut Biru <ibiru@archlinux.org>" is unknown trust
error: gtk2: signature from "Ionut Biru <ibiru@archlinux.org>" is unknown trust
error: vim-runtime: signature from "Eric Belanger <eric@archlinux.org>" is unknown trust
error: gvim: signature from "Eric Belanger <eric@archlinux.org>" is unknown trust
error: libltdl: signature from "Allan McRae <me@allanmcrae.com>" is unknown trust
error: imagemagick: signature from "Evangelos Foutras <evangelos@foutrelis.com>" is unknown trust
error: initscripts: signature from "Tom Gundersen <teg@jklm.no>" is unknown trust
error: libevent: signature from "Eric Belanger <eric@archlinux.org>" is unknown trust
error: libpulse: signature from "Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>" is unknown trust
error: libtool: signature from "Allan McRae <me@allanmcrae.com>" is unknown trust
error: man-pages: signature from "Andreas Radke <andyrtr@archlinux.org>" is unknown trust
error: openssh: signature from "Gaetan Bisson <gaetan.bisson@normalesup.org>" is unknown trust
error: rhino: signature from "Guillaume ALAUX <guillaume@archlinux.org>" is unknown trust
error: xf86-video-vesa: signature from "Jan de Groot <jgc@archlinux.org>" is unknown trust
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.
[root@archy ~]#