We believe that your issue has been closed by the upload of
Version 0.2.3 of grml-saveconfig from Michael Prokop <mika@grml.org>.
The explanation is attached below

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Format: 1.7
Date: Fri, 16 Mar 2007 19:56:18 +0100
Source: grml-saveconfig
Binary: grml-saveconfig
Architecture: source all
Version: 0.2.3
Distribution: unstable
Urgency: low
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml-saveconfig - utilities and documentation for saving and restoring configuratio
Changes: 
 grml-saveconfig (0.2.3) unstable; urgency=low
 .
   * Rewrote partition handling so it works with fs-labels as well.
     [Closes: issue120]
Files: 
 03e2e8ec532f48ea1d38c0e78f2c6ef3 544 grml optional grml-saveconfig_0.2.3.dsc
 f2846f9625437406b94d3560cb5595dd 17602 grml optional grml-saveconfig_0.2.3.tar.gz
 22aeaf33486eb9fa9e7e6f54df9e9f83 27002 grml optional grml-saveconfig_0.2.3_all.deb

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The partition selection does not provide all the available partitions due to 
possible use of fs-labels in /etc/fstab. Adjust the partition selection code in 
mkpersistenthome therefore.