After a week of hair-pulling attempts to get the forums working again - they are working. Now, we can continue to postulate what is going on with FF and Eidolon…
The problem was some sort of url rewriting issue caused by Godaddy hosting (cheap). Oh well, you get what you pay for. After many attempts on the forums of WordPress and bbPress insiders, we found the solution, and made a donation!
Many thanks to bbShowcase.org for their help!