App store won't save credit card: Server Error

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I've been using my Droid X for a day, and I have downloaded a few hundred thousand apps. Anyways, I decided to pony up and buy an app (ROM Buddy, for those interested). Anyways, after I select pay with credit card, enter all my info (correctly, I believe), and press save card, I get an error saying:

"Attention: A server error has occurred. Retry, or cancel and return to the previous screen."

For every app I've tried (about six), on wifi, on 3G, at home, at work. Please help. I feel like I've had too much money lately, and I can't spend it on my DX.

Thank you in advance

 

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Solved!

Problem solved. For those of you with similar errors:

On a desktop computer, go to <a href="http://checkout.google.com">http://checkout.google.com</a>, enter your credit card, and retry your app purchase.

Works for me. Now go spend lots of money on the app store!