Comment 3 for bug 1316788

This can be fixed with a little javascript attached to the form to clear it after submitting. It's not perfect (NoScript, etc, can defeat it) but for public terminals it should suffice since the JS environment is controlled there.

Here's an example: http://jbkflex.wordpress.com/2012/10/18/reset-and-clear-the-html-form-after-submitting-when-you-hit-browsers-back-button/