You already stated that you have a different problem because you don't use IPv6, so it's not the same problem, just the same symptom. The only common denominator here is that s2s is not working. If we would keep a single thread where everybody posts about his s2s issues, then this thread would become big and confusing pretty soon.
Also when reporting issues, please try to add as much information as possible. At least some openfire logs would be helpful. You also may want to have a look at http://www.catb.org/esr/faqs/smart-questions.html and http://www.chiark.greenend.org.uk/~sgtatham/bugs.html