Hm, this is really weird. Just to confirm, if you do this:
sudo -u postgres head /var/lib/postgresql/8.3/main/server.key
does that work, or do you get an error message? What is the current permission on that file, still 640 root:ssl-cert?
Hm, this is really weird. Just to confirm, if you do this:
sudo -u postgres head /var/lib/ postgresql/ 8.3/main/ server. key
does that work, or do you get an error message? What is the current permission on that file, still 640 root:ssl-cert?