I have tried to set this up and have filled in and saved details for two credit cards using Firefox.

When I access the payment screen for payment - (in this case for VTTA membership) and click on the credit card number I can see a hover screen with ****1234 or ***5678 indicating my saved cards. When I press return for either card no details are filled in. When I key in the details manually for either card I get a red highlight for all fields and the payment is not processed. Does anyone know what I may have done to cause this?