Thanks for spotting that! There was something weird going on with the Apache server. I changed the file name and now it should work as expected. Can you please confirm that?

http://iridia.ulb.ac.be/argos/upload/re ... 13.tar.bz2

I did and for me it works well. Also other people have downloaded it and uncompressed it with no problem.
What exactly is the error you get?