I have done a business card design that has a image in it from illustrator where the background is transparent. Printers went to print it and it is printing square border around the image, I went through all previews and checked PDF I sent them and couldnt see what it was but it shows up in indesign, window-output-flattener preview- transparent objects, as a pink area. Ive just looked at other flyers I have had printed elsewhere and transparent objects show in the projects in the same way but they all printed fine. What is happening with this printer and the flattening issue, is it my fault?