It seems a couple of people still have trouble with saving the pdf from the ftp server. I have tried it in Internet Explorer (save target as - works), Firefox (save link as - works), as well as Safari (no trouble whatsoever with just click to download). I can't say about other browsers, but there should always be a possibility enabling you to 'save ... as'.
I don't know what else to tell you. If you can't make it work, e-mail me (link is in the sidebar), I'll send you the pattern - no problem.