testing_rsync

jigdo-lite ...
  ftp://ftp.us.debian.org/debian/
  Ctrl-C
run once again (possible network errors)
if it's still not enough:
mv debian-testing-i386-DVD-1.iso.tmp debian-testing-i386-DVD-1.iso
rsync --verbose --progress rsync://cdimage.debian.org/cdimage/weekly-builds/i386/iso-dvd/debian-testing-i386-DVD-1.iso debian-testing-i386-DVD-1.iso