When I enable 'Use Secure URLs in Frontend' it messes up the urls of secured pages. For example, this is the url I get for the checkout page
http://www.domain.com/https://www.domain.com/checkout/onepage/
It seems as though it's adding an extra 'http://www.domain.com/' before the secure domain. Does anyone know why this is happening?
I ran into the exact same issue a few weeks ago. I never got to the bottom of why it occurred but the quick fix is:
Within a MySQL client run the following SQL:
select * from core_config_data where path = 'web/secure/base_url';
This will return a nice string of data. Then run:
update core_config_data set value = "https://yourdomain/" where config_id = ?
Where ? is the config_id of the ID from the SQL in the select statement. You may need to clear the cache or delete /var from the magento root directory. Yet this should get you back operational. If not let me know and I can help more.