I uninstalled Postgresql and checked the keys:
root@kproot:/var/lib/postgresql/9.1/main# apt-key list
/etc/apt/trusted.gpg
--------------------
pub 1024D/BA684223 2012-02-08 [expires: 2017-04-19]
uid isv:ownCloud OBS Project <isv:
[email protected]>
pub...