I have a credit card that I use to make online purchases. I used it on my iTunes account as well. Now, however, I have bought a new machine and iTunes complains:
You are logging in from a new machine. You must verify your payment information.
I am moved to the payment information and prompted to enter my security code. iTunes won't accept it. I have double-checked and everything, but I keep being returned to the payment information page. The page prompts:
Please enter valid Security Code.
The code I enter is valid (I know where to find it and have used it before). I see other reports of this on the internet, but no solution.
Is there a known workaround to this?
Disclaimer: iTunes is not a web app, but the store inside of it is.