Firefox - Redirect Loop

Every once in a while I encounter a Firefox error like, "Firefox has
detected that the server is redirecting the request for this address
in a way that will never complete." The thing is that I'm pretty well
convinced that FF is dead wrong in its determination. Most of the
Google commentary I could find deals with clearing caches, etc. I'm
just wondering if anyone has figured out exactly what it is that
causes FF to come to this conclusion and what we need to do in order
to keep it from making such erroneous determinations.

Thanks for any input.

          ... doug