I don't have time to chase it down at the moment but maybe you do, Chris. I recall reading some time ago that the problem is in the poppler PDF-writing library, which uses a broken algorithm to make the gradient out of a set of constant-color stripes whose edges are being rendered as white lines by some readers and not by others. Other PDF-writing programs that do not use poppler (from Win or Mac worlds) produce them differently. So the problem is in poppler, if I recall it all correctly.
I don't have time to chase it down at the moment but maybe you do, Chris. I recall reading some time ago that the problem is in the poppler PDF-writing library, which uses a broken algorithm to make the gradient out of a set of constant-color stripes whose edges are being rendered as white lines by some readers and not by others. Other PDF-writing programs that do not use poppler (from Win or Mac worlds) produce them differently. So the problem is in poppler, if I recall it all correctly.
--jh--