We believe that your issue has been closed by the upload of
Version 0.14.0 of grml2usb from Michael Prokop <mika@grml.org>.
The explanation is attached below

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Format: 1.8
Date: Wed, 26 Jun 2013 17:27:18 +0200
Source: grml2usb
Binary: grml2usb
Architecture: source amd64
Version: 0.14.0
Distribution: unstable
Urgency: low
Maintainer: Grml Team <team@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml2usb   - install Grml system / ISO to usb device
Changes: 
 grml2usb (0.14.0) unstable; urgency=low
 .
   * [360c9e5] Use lowercase 'timeout' command in syslinux configuration
     [Closes: issue1262] Thanks to Martin Å louf for reporting this bug
     including a workaround
   * grml2iso related changes:
     - [20752e3] skip --uefi option of isohybrid if ISO doesn't
       ship /boot/efi.img
     - [f3370b9] extend error message of required ISO generation
       tools with xorriso
     - [8e0bdf8] mention isolinux in 'isohybrid executable not
       found' message, add isolinux to recommends
     - [37fa9f8] disable UEFI mode by default, only enable for
       xorriso under according prerequisites
     - [86c00b8] make sure we have the sbin directories in our PATH
Checksums-Sha1: 
 13357d4e3dbffe4b3ee848ce1a19fb732c1c824b 1083 grml2usb_0.14.0.dsc
 fa304d1504147254a3d93c391138ec5b8e03f594 391589 grml2usb_0.14.0.tar.gz
 d497f4ea0e7009f6c1a155423303cacb9f33e059 217038 grml2usb_0.14.0_amd64.deb
Checksums-Sha256: 
 d80d6d4690c7e8ba1db49e05a0369a93ce905ab66758e741eff78facb17ce6cc 1083 grml2usb_0.14.0.dsc
 e8a1f0ac700a87803b97945781fd88e6c6538a1173d96cc4ff6e32e3aa61facb 391589 grml2usb_0.14.0.tar.gz
 045626a7ccaa429641f1b6e9fd3bb95d99bee32f06fcdcf0d800fe371c16b43a 217038 grml2usb_0.14.0_amd64.deb
Files: 
 26681be7dad5952d413140a0f5c767d0 1083 admin optional grml2usb_0.14.0.dsc
 f05a7010ad3646c6b86f38b3a752d6e1 391589 admin optional grml2usb_0.14.0.tar.gz
 0f9a3ab0269e4566e3a706d445918884 217038 admin optional grml2usb_0.14.0_amd64.deb

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