whenever i close firefox (osx 10.6.3, firefox 3.6.6), i come back to find the history gone. i've looked for answers and tried all sorts: my prefs all are set to saving history, i'm not set to start in private browsing, i've downloaded a new copy of firefox and replaced the old, and following advice from a forum i went into about.config and checked that general.useragent was not in bold, it wasn't. the problem even persisted when i recently upgraded from osx tiger to snow leopard

the weirdest thing is that using history>show all history, it is completely blank when i start up. but if i type stuff into the url bar, it comes up with history results (not bookmarks, i've checked) that i haven't visited in months, years even, there's history results for maps for a game i sold 2 years ago