Sam Varghese <sam@gnubies.com> wrote:

My bid to buy one was rejected twice because of the same issue - even though the address on my credit card (Mastercard) and my shipping address are identical in all respects.

When I tried with a VISA card, there was no such problem and the order was accepted.

In my case the problem was with a VISA card, but a different organization was involved (it had nothing to do with Linux or tablets). However, the verification mechanism was probably the same.