It works fine... I just re-checked. I suggest that you do a save-as, rather than try to view it in your browser, because the server is really slow and the document may fail to load properly. You are required to enter the username and password a couple of times to start the download.
Hmmm, don't know what to say... It's an FTP link, so if you've got issues there, that could be the problem. I'm on a PC using Firefox and have no problems. It's worth figuring out what's going on if you're interested in more Lexicon doc's, as most everything is available on the FTP site. Good luck!