I'm a 1.0 CE holder and i used the same exact card for 1.0 and it worked fine and now i'm having the 401 and 601 error and I work at the bank my debit and credit cards are from. I called a friend that works in card services and he said that there is nothing is being charge, there is way more than enough funds in both my debit and credit card to use to pay. So therefore Bublex the problem is with the online payment agencies SE is using. And that "small number of customers that are experiencing issues when trying to set up their subscription" will increase way more in the next week or two.