Those who come and find this question unsolved can use the solution at d.o (drupal.org/node/1663338) which is
Solved it!! It had to do with the .htaccess file! I needed to comment the following with regard to SSL Certificates.
# SSL Certificates
# RewriteCond %{HTTPS} !=on
# RewriteRule (user|admin) https://%{SERVER_NAME}%{REQUEST_URI} [L,R]
# RewriteCond %{HTTPS} !=off
# RewriteRule (node/*/edit|node/add/*) http://%{SERVER_NAME}%{REQUEST_URI} [L,R]
I am not entirely clear on why it suddenly worked, but obviously it has something to do with these rewrite rules.