Hi Klas
Thanks for the info but the persistent search option has real issues: it fails if you have several menu items pointing to the same seblod search list but with different parameters overrides: which ever menu item you take it will show you the same results!
It would be good but the solution we found is to use a simple FREE BUTTON on the content view of each element with the following custom attribute
value="Previous" onclick="history.back()"
thanks
cyril