I am actually quite impressed by PDF creator, but there is a problem with converting graphics with a "gradient flood fill". If you look at the picture you will see that the plane with the blue (solid fill) trim looks good, but the plane with the red gradient fill trim shows really bad "artifacting". I have even tried to add a border to the gradient fill area, but to no avail.
Maybe this is something you could look at for a future fix?
Maybe there is a fix already and I have been too lazy to find it? ;)
I see I can't post graphics directly, so I'll have to post the link here.