(Un)Official specs for changes are the best option. Other thing might be asking direct support from Topfield, but I am guessing someone has already tried that. Naturally you can hire a coder to figure out and patch out the issue.
It is improbably that Topfield will give any user official specs to any users, because that is their know-how to earn money. If you mention "(Un)Official specs" do you know a proper source to start looking terefore?
I will try to contact the Topfield support pointing out the problem and mention that the FAQ's concerning vlc 0.8.5 are not correct (see the other
thread), but I have no big hope, that they will provide usefully hints.