Unable to upgrade community/rekonq (PGP signature issue)

Hi all,
I am unable to upgrade community/rekonq from 0.8.0-1 to 0.8.1-1
due to

error: rekonq: key "22AD5874F39D989F" is unknown
error: key "22AD5874F39D989F" could not be looked up remotely
error: failed to commit transaction (invalid or corrupted package (PGP
signature))
Errors occurred, no packages were upgraded.

/etc/pacman.d/gnupg/gpg.conf has

no-greeting
no-permission-warning
lock-never
# keyserver hkp://keys.gnupg.net
keyserver hkp://pgp.mit.edu

/etc/pacman.conf has

GPGDir = /etc/pacman.d/gnupg/
SigLevel = Optional TrustAll

I see that many other users have successfully upgraded this package. Any
idea whats wrong? Thanks in advance.

Regards.

Keshav