On http://www.debian.org/releases/stable/debian-installer/ , the links to amd64 images return 404 Not Found errors. Checking out http://cdimage.debian.org/debian-cd/3.1_r5/ shows that no /amd64/ directory exists?
http://cdimage.debian.org/debian-cd/3.1_r5/amd64/iso-cd/debian-31r5-amd64-netinst.iso http://cdimage.debian.org/debian-cd/3.1_r5/amd64/iso-cd/debian-31r5-amd64-businesscard.iso http://cdimage.debian.org/debian-cd/3.1_r5/amd64/iso-cd/ --> 'Full CD sets' link http://cdimage.debian.org/debian-cd/3.1_r5/amd64/bt-cd/ http://ftp.debian.org/debian/dists/sarge/main/installer-amd64/current/images/ Also, the section in http://www.debian.org/ports/amd64/ stating: "*To install Debian GNU/Linux* 3.1r5 (*sarge*) on AMD64 systems, download any of the following images: netinst CD image<http://cdimage.debian.org/cdimage/unofficial/sarge-amd64/iso-cd/debian-31r4-amd64-netinst.iso>(100 Mb)" is a link to the iso for 31r4 ( http://cdimage.debian.org/cdimage/unofficial/sarge-amd64/iso-cd/debian-31r4-amd64-netinst.iso). Thanks.