I take that to mean Amiga Inc., Gateway, DigiPak, Escom or whoever tries to lay claim to misc. OS tidbits, may not sue them later.
The whole prejudice thing has something to do with the merits of a thing. Like how a judge can dismiss a case with prejudice and that means that he thinks that the case itself does not merit any further involvement by the court. But, a case dismissed without prejudice means that the judge isn't saying anything one way or the other as far as future court involvement is concerned.
Or, something like that. :-)