Hmm? Someone is getting tricky with this page. This page does not download to my computer as a PDF. It is downloading as an image on the web page. If I attempt to print it using the standard Safari print command, I get the blank page you and Jon mentioned. However, I noticed at that bottom of the site page a tool bar with a printer icon on it. When I click on that icon, not the Safari print icon, there is a delay of a few seconds with a note to the effect the print is being prepared. Then the normal printer dialog appears and I can print to the printer or I can print to PDF and either one works perfectly.
I haven't gone rummaging through the code for the page to see what is going on and I don't know if this is a Flash image or HTML 5 that is generating the screen image and print image. It could easily be either, but it doesn't "feel" like Flash.