I woudn't entirely agree that this is a duplicate of bug #637649 since that was reported specifically for the payment page. We users are conditioned (hopefully) to always check SSL info for pages where we enter our credit card details, and I think that for the purposes of the credit card page what I wrote on bug #637649 applies:
I would suggest to address this issue adding a status bar with a green icon and "You are connected to http://xxx.com using a secure connection, click here to verify certificate" (or a red icon and "This connection is not secure, click for details", as the case might be)
I woudn't entirely agree that this is a duplicate of bug #637649 since that was reported specifically for the payment page. We users are conditioned (hopefully) to always check SSL info for pages where we enter our credit card details, and I think that for the purposes of the credit card page what I wrote on bug #637649 applies:
I would suggest to address this issue adding a status bar with a green icon and "You are connected to http:// xxx.com using a secure connection, click here to verify certificate" (or a red icon and "This connection is not secure, click for details", as the case might be)