Our application is running the Jboss/Tomcat bundle. It starts with a list of departments. Clicking a department takes the user to the list of items in that department. Clicking the item takes the user to the item detail. Pressing the 'Back' button usually causes this error:

Warning: Page has Expired

The page you requested was created using information you submitted in a form. This page is no longer available. As a security precaution, Internet Explorer does not automatically resubmit your information for you.

To resubmit your information and view this Web page, click the Refresh button.


Oddly, the 'Back' button seems to cause this error about 90% of the time.

I've tried to add this line to the JSP source without sucess:

<meta http-equiv="expires" content="0">

The error seems to confuse most users, even though we have a 'Back to list' link in various places.

Any suggestions would be greatly appreciated.
TIA,
George