I have a feeling that what any of us say in this thread is not being paid attention to, and that the issue/conflict/whatever is being dealt with privately. I suspect that this is really just a "takedown notice" so that Covert can cite it at a later date if negotiations turn sour.
On the subject of the actual "takedown notice" I have to say that it makes me sad. Many of you know my opinion on Sengir's actions involving Forestry and Technic, namely the addition of anti-technic code, and it disappoints me to see one of the modders that I respect and look up to threatening to resort to the same actions. RailCraft is an amazing mod, but I refuse to use any piece of software (be it game, mod, or other) that uses malicious code to achieve its goals.