Anyone else having problems buying online when the MasterCard Secure, or Verified by Visa security pops up at the final stage of a transaction? Usually I can muddle through, even though you can't really see what you've typed in the password boxes, but today I've tried to complete a purchase and the iPad is just not playing at all. Tapping on the password produces a flashing curser a distance away from where it should be, and it is impossible to enter the password in the three boxes as required. It makes me wary of completing sales on line which is a total pain as shopping with the iPad is so convenient otherwise.