Basically I have a checkout process that requires several steps to complete. Several pages post information as opposed to sending it through a get request. If after one of those pages, the user hits the "back" button on the browser, instead of being returned to the previous page they receive an IE error stating that the page has expired and that for security reasons the data is not automatically transmitted again. It suggest hiting the refresh button, which pops up another warning requesting whether you really want to transmit the data again (lovely Windows).
Any thoughts on this? Is this a typical thing to be dealing with?