> There aren't any apps in the source tree that were written/hacked to > rely on the previously broken behavior, are there? Nope, I've checked before my commit. And AFAICT, the #4274 was filled as a bug on BNetEndpoint::Send() misbehavior, so one could hope that nobody directly use BNetBuffer::Size() and BytesRemaining() methods directly. That's the good thing about Network C++ kit: no so much people use it extensively :-) Bye, Philippe Houdoin.