(I did try to find the answer elsewhere...)
Oh... wait, I think I may have figured it out. Under Unanswered tab, a sub-tab is "No upvoted answer" which totallly confounded me. upvoted?
I believe this means that while a question may have been answered, no one has clicked on the star of one of the responses. Is that it?
Do I get any points or an increase in my status if I got it right? ;-)