First big one:
  http://nix.cs.uu.nl/dist/stratego/strategoxt-0.17M1pre13702/

Last small one:
  http://nix.cs.uu.nl/dist/stratego/strategoxt-0.17M1pre13671/

It seems to be a compression/tarball issue:

-------------------------------------------------------------------
-rw-r--r-- 1 martin users 7492634 2005-11-22 21:26 strategoxt-0.17M1pre13671.tar.gz
-rw-r--r-- 1 martin users 15223768 2005-12-03 05:04 strategoxt-0.17M1pre13791.tar.gz

-------------------------------------------------------------------
martin@linux:~/strategoxt-0.17M1pre13671> du --si --max-depth=1
349k ./config
168k ./news-archive
287k ./manpages
234k ./autoxt
1.3M ./srts
3.5M ./stratego-front
2.7M ./asfix-tools
8.7M ./strc-core
3.2M ./gpp
1.9M ./c-tools
6.0M ./stratego-lib
1.9M ./xtc
1.3M ./concrete-syntax
2.8M ./xml-front
1.5M ./aterm-front
1.8M ./sdf-front
2.7M ./sdf-tools
3.4M ./stratego-regular
1.4M ./xtc2
46M .

-------------------------------------------------------------------
martin@linux:~/strategoxt-0.17M1pre13791> du --si --max-depth 1
349k ./config
168k ./news-archive
287k ./manpages
234k ./autoxt
1.3M ./srts
3.5M ./stratego-front
3.1M ./asfix-tools
8.7M ./strc-core
3.3M ./gpp
1.9M ./c-tools
5.9M ./stratego-lib
1.9M ./xtc
1.3M ./concrete-syntax
2.8M ./xml-front
1.5M ./aterm-front
1.8M ./sdf-front
2.7M ./sdf-tools
3.4M ./stratego-regular
1.4M ./xtc2
47M .

This issue has been solved by STR-486.