We have a website with a credit card input form.
The user enters his information and clicks the "Submit" button. Then you go to the thank you page.
On a ThinkPad laptop running IE 8: if the user clicks the back button (from the thank you page), he returns them back to the credit card record. However, there are no fields for the name on the card, card number and first line of the address. (Ignore for a moment that the page should not be cached.) I have other machines running IE 8 and 9 that do not exhibit this behavior.
I do not mean that they are empty. I mean, the input fields are not flat. There is an expiration date, city, state and mailboxes. Just not listed above.
Any ideas on what can do this? The fields themselves are always visible, and to hide them absolutely zero code.
My client says that this happens in other forms on their website. The main site is a joomla application that uses iFrame to display forms from my application.
I have no idea where to start even with this.

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