Twin directories of is:

[DIR]  ftp://ftp.int.ru/.1/CTAN/support/aspell/dict/is/
[DIR]  ftp://aeneas.mit.edu/pub/gnu/aspell/dict/is/
[DIR]  ftp://ftp.saintjoe.edu/pub/mozilla.org/firefox/releases/latest/mac/is/
[DIR]  ftp://ftp.saintjoe.edu/pub/mozilla.org/firefox/releases/latest/linux-i686/is/
[DIR]  ftp://ftp.saintjoe.edu/pub/mozilla.org/firefox/releases/latest/win32/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/update/win32/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/update/mac/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/update/linux-i686/is/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/netbsd/NetBSD-release-3-1/src/gnu/dist/gcc4/libstdc++-v3/testsuite/22_locale/ctype/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.ankara.edu.tr/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/win32/is/
[DIR]  ftp://ftp.hosteurope.de/mirror/ftp.mozilla.org/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.crihan.fr/mirrors/ftp.mozilla.org/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.cvut.cz/mirrors/mozilla.org/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.filearena.net/mnt2/mozilla/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://24.215.0.24/mozilla/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.rz.tu-bs.de/pub/mirror/.mounts/sda11/rsync.mozdev.org/mozilla/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/mozilla/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/browser/mozilla/firefox/releases/3.0.3/win32/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/mac/is/
[DIR]  ftp://ftp.hosteurope.de/mirror/ftp.mozilla.org/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.crihan.fr/mirrors/ftp.mozilla.org/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.cvut.cz/mirrors/mozilla.org/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.filearena.net/mnt2/mozilla/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://24.215.0.24/mozilla/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.rz.tu-bs.de/pub/mirror/.mounts/sda11/rsync.mozdev.org/mozilla/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/mozilla/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/browser/mozilla/firefox/releases/3.0.3/mac/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.hosteurope.de/mirror/ftp.mozilla.org/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.crihan.fr/mirrors/ftp.mozilla.org/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.cvut.cz/mirrors/mozilla.org/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.filearena.net/mnt2/mozilla/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://24.215.0.24/mozilla/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.rz.tu-bs.de/pub/mirror/.mounts/sda11/rsync.mozdev.org/mozilla/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/mozilla/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/browser/mozilla/firefox/releases/3.0.3/linux-i686/is/
[DIR]  ftp://ftp.unex.es/pub/gnu-i18n/po/PO-files/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/update/linux-i686/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/update/mac/is/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/isc-sfo2-01.mozilla.org/pub/mozilla.org/firefox/releases/3.0.3/update/win32/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/update/linux-i686/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/update/mac/is/
[DIR]  ftp://ftp.univie.ac.at/applications/firefox/3.0.3/update/win32/is/
[DIR]  ftp://ftp.hosteurope.de/mirror/ftp.mozilla.org/firefox/releases/3.0.3/update/linux-i686/is/