As most of you know, the search features since we went to this new version of UBB have not been so nice. It limits you to a 12month range, which is not easy to use if your looking for something older. Also, it doesn't always give you results it should when searching the subject line, even though there are in fact threads with that text.
Anyway, I found out that if you blank out the date range options and don't enter anything, it will allow you to search for all posts again. I'm sure the DB Admins don't like this, sorry..