Em--to repeat myself, nearly:

Um--a word, just in case there are some people who haven't realized this: the Search in this line About Us | What's New | Search | Site Map | Contact Us is for the Word A Day section.

The Search in this line Control Panel · My Home · Main Index · Search · Active Topics
is for this discussion board.

When you use the second one, you should get either that nothing was found, or a list of posts that contain that word or phrase. I've never gotten anything else. I will say that I have never checked the Show a preview of post body with results. option--perhaps that would help?