I cannot use mastercard at all. running a test, the first card number is a 5 and it strips it off, then tells me it ins unable to identify card type. If I use any other number as a test, it keeps going back to the error message. Does not even give an easy option for the customer to set up an account and fund it in other ways. Not sure about other CC's because I only have MC's to test with, but even if VISA or others work, this will reject over half our customers!
This is definately a problem as we were getting ready to do a big launch with alertpay as our main processor. This has to be fixed before we can use alertpay or launch out site.