It is getting me mad... I do have a model, which complies to every rule, I can think. See appended photos. Due to Copyright issues I can not upload the model file itself. Still I get these insane senseless messages (because no further rejection explanantion is given, this is what I quote senseless...). At the end of this post you can see, what Netfabb says to this model - 100% tight, zero problems .... It is really frustrating.... does anyone has a clue ?