It's not working for me. I click the A4 PDF on the Monster Mash page and it takes me to a fullscreen Dopplr ad that I can't do anything on other than sign up for Dopplr.
Try again. I'm not sure what was causing this issue, but I added new links and it should be working properly now :)
It's still taking me to the ad. I can click the X on mobile and see the PDF, but I doubt the issue has been fixed on the desktop, where I was seeing it before.