Do you mean the Gerber that FZ generates, because I've been using it as Gospel and someone put my ECU to a PCB manufacturer and it was perfect.
Bottom of this post
http://speeduino.com/forum/viewtopic.php?f=27&t=338&start=20
EDIT
You're right the Gerber Export is wrong for some reason. If I export the normal resistor it's fine in Gerbv, but Peter's isn't. That Gerbv is brilliant, so many more features than GerbView.