This is a great plugin, but images shown on a network site aren't included in the PDF. The testsuite shows "FPDF error: Missing or incorrect image file: *absolute path to file*"
My guess is that this is due to the way images are inserted on a multisite installation since it uses a redirect have a friendlier file path. This makes it so the URL to the image doesn't match with the absolute path. Is there a way that this plugin could pull images via the URL rather than using the absolute path?