This behavior occurs because of the way in which Internet Explorer requests the Web page that contains the InfoPath 2007 form. In the scenario that is described in the "Symptoms" section, Internet Explorer submits a GET request to obtain the Web page information when you click
Back. This GET request obtains a new copy of the InfoPath 2007 form instead of retrieving the InfoPath 2007 form information from the Internet Explorer cache.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
327584�
Back button causes a GET request instead of using the cache