So we have a pdf fillable form on a website. Download it to a pc, fill in the form and save it (or email it). Open it. The filled in portion is visible and prints. Download the same form to a mac, fill it in, save it - fine. Email it to a pc and open it. The filled in portions appear blank but click on any filled in portion and that portion becomes visible - until another section is clicked on when that one only is visible. None of the 'fillings in' print.

Any way to avoid this problem or of making the data properly visible?