link issues resolved 
Unfortunatly the use of the dyndns name cause problems. For whatever reasons the external-link.png image was referred using the server local name, not the dns name. Now it should work as I changed config to work with a non-dynamic address (so if you access the site using its numeric ip address, links shown will still have the name referred.)
Dynamic DNS 
start of entry url was changed to respect new DNS address which is served by
http://dyndns.org.