Hi there,
I am not sure what I am doing wrong here but I have an illustration I did and when exporting as a PDF I get these white stitch marks inbetween the layering. My steps previous to that were Object > Live paint, where I finalized colouring of my illustration. I'm guessing live paint probably made the layers space out a bit, but I wouldn't see why. The layers are fine when in Illustrator, it's only when I export it into PDF. I would have put a image up but the forum doesn't allow me to post PDFs for some reason. Thanks for the help in advance.