We believe that your issue has been closed by the upload of
Version 0.14 of grml-debootstrap from Michael Prokop <mika@grml.org>.
The explanation is attached below

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Sun, 09 Dec 2007 20:16:15 +0100
Source: grml-debootstrap
Binary: grml-debootstrap
Architecture: source all
Version: 0.14
Distribution: unstable
Urgency: low
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml-debootstrap - wrapper around debootstrap for installing plain Debian via grml
Changes: 
 grml-debootstrap (0.14) unstable; urgency=low
 .
   * Make sure variable ISO is unset variable if not used.
     Thanks for the bugreport, Darsha! [Closes: issue352]
Files: 
 08837daff0e8195361f53435fa5c079d 682 grml optional grml-debootstrap_0.14.dsc
 2cdfaa0d14a2fc3a88535517bdfc2a5b 44188 grml optional grml-debootstrap_0.14.tar.gz
 9495de1557ead87dcde8ce041247916e 18992 grml optional grml-debootstrap_0.14_all.deb

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFHYUdH2N9T+zficugRApCYAJ9bTdWjIAHbs7olGI8twJo+VaoBZACcCFIX
d8Rjb+pxxQv07OFWj7F3osE=
=WLUJ
-----END PGP SIGNATURE-----