> > > I'm guessing pcbexpress wants black where mask and grey where exposed. > > > > Note that the latest version of PCB does this. > > Do you mean that you have changed polarity of something in PCB while > changing version?
I don't know about the "while changing version" part, but yes, we changed the polarity of the mask gerbers a while back. 4pcb complained about it and helped us get them right.
