Gary,It sounds like the exact same problem as described in posts 22 & 23 above.
Although now that I've had some time to look at my own Fatbomb installation, my keywords don't have the "+" sign in them either, so my suggestion of the possible problem to John isn't accurate. Most of the other bombs have "+" between each word in a phrase, so I thought Fatbomb did too, but it doesn't. My installation is working on a 2nd search or on page 2, however.
Will have to look into this a bit more.
Jeff