🚀 go-pugleaf

I have have ecountered the following Postscript problem and I was
wondering if anybody knows what is the matter.

I wrote a program to print color posscript where every point has
potentially a different color. When my postscript file is printed
on my local non-color printer I get the desired output (in shades
of gray of course), but when it is printed on a color postscript
printer every 1/8 to 1/4 of an inch I have a white vertical line.
Strangely, GS (Ghostscipt) gives me the same phenomena. I am positive
that in my Postscipt file I am not skipping lines. The resolution
of the plot is 72 dots/inch. When I scale the plot to 90 dots/inch
the the frequency of the lines changes. At 300 dots/inch the lines
(I think) disappear. From my understanding of Postscript I do not
understand how this can happen. Does anyone know what is going on?
Is their a way of fixing the problem? Any help, comments, suggestions
would be appreciated.
                                             - Henrik