"The site" being Paheal, which means that this image still isn't direct from the source. The artifacts probably aren't your fault in this case, but you should still be able to see them; there are grainy splotches of color around virtually every black line in the image. Look at the hair over her left eye, for instance; all that weird pixelation is JPEG artifacting.
Yeah, I finally got it. It looks fine to me at this size but when you zoom in you can definitely tell. It took me a long time to even notice them, so why is it such a big deal?