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

Targets (3): gvfs-1.10.1-2  gvfs-obexftp-1.10.1-2  kdeutils-kgpg-4.7.4-2

Total Installed Size:   8.45 MiB
Net Upgrade Size:       0.67 MiB

Proceed with installation? [Y/n] y
(3/3) checking package integrity                                    [#####################################] 100%
error: gvfs: signature from "Dave Reisner <d@falconindy.com>" is unknown trust
error: gvfs-obexftp: signature from "Dave Reisner <d@falconindy.com>" is unknown trust
error: kdeutils-kgpg: key "F3E1D5C5D30DB0AD" is unknown
:: Import PGP key D30DB0AD, "Andrea Scarpino <bash.lnx@gmail.com>", created 2011-04-19? [Y/n]