We believe that your issue has been closed by the upload of
Version 0.6.8 of grml-x from Michael Prokop <mika@grml.org>.
The explanation is attached below

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Hash: SHA1

Format: 1.8
Date: Mon, 18 Mar 2013 14:58:48 +0100
Source: grml-x
Binary: grml-x
Architecture: source all
Version: 0.6.8
Distribution: unstable
Urgency: low
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml-x     - wrapper for startx for running X Window System
Changes: 
 grml-x (0.6.8) unstable; urgency=low
 .
   [ Evgeni Golov ]
   * [7933f6b] also look for bootparams in /lib/live/mount/medium
     [Closes: issue1239]
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Fixed in Git thanks to Evgeni: http://goo.gl/Apagf

/live/image doesn't exist any longer, we need to adapt grml-x to use live-boot's 
new /lib/live/mount/medium/