I'm encountering problem at checkout time on my Site. I fill in the address, then when I click continue, nothing happens and the next step that would be the payment, is not loaded. I checked and the saveBilling method is called normally. I put it to display the returned Html, and the pagemento conditions are there, but it is not rendered on the checkout page.
Returning html when passing through saveBillingAction:
Magento version is 1.8.1.