Terms of Use problem with Firefox

[pkrpkr]

1. Click 'Add listing'
2. Spend 10 minutes entering the text for the listing
3. Click 'here' in the text "By adding this listing you agree to the Terms of Use found here"
4. Terms of Use screen appears. For lack of a 'back' button the user goes back to the previous page via the browser.

Result: the Add listing screen appears (correct), but the listing text entered in the previous 10 minutes is gone (not correct).
This occurs with Firefox 3.0.11. The problem doesn't occur in IE or Google Chrome.

Anyone else have this and/or ideas to solve this?