I updated from Camino v2.0.9 to v2.1 on 30th November
Daily, I used to copy (library/applications support /camino) history.dat as a backup.
Since updating Camino, history.dat has stopped updating.
Yet Camino v2.1 shows a good and full updating history within Camino, from before and after the update, it is being stored somewhere, but under a different name.
A search (inc hidden files) does not show it anywhere.
+++++UPDATE+++++
Bugzilla
Has informed me it is now stored in places.sqlite, same location, but at a much reduced file size, 50mb down to 9mb