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

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Hash: SHA1

Format: 1.8
Date: Tue, 16 Sep 2008 01:02:53 +0200
Source: grml-network
Binary: grml-network
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-network - network related helper scripts
Changes: 
 grml-network (0.2.3) unstable; urgency=low
 .
   * Depend on grml-etc-core, as several scripts use
     /etc/grml/script-functions. Thanks to Darshaka Pathirana!
     [Closes: issue515]
   * Bump to Standard-Version 3.8.0 (no further changes).
   * Fix binary-arch-rules-but-pkg-is-arch-indep in debian/rules.
Checksums-Sha1: 
 8f2abc1aeac4155276b21e2a8b906e888d2d3ee4 869 grml-network_0.2.3.dsc
 95c265ecda4dd85f5c7681fd83133de70aacb389 85992 grml-network_0.2.3.tar.gz
 9dbac670b86340dafa4d8cfc15f8a2f2b500a298 90826 grml-network_0.2.3_all.deb
Checksums-Sha256: 
 4a2c75ef2f794d0b72c3e055e346edc824144140322ffd72fb068da8ba8eb077 869 grml-network_0.2.3.dsc
 3f9b57cd3e799e92f99fe19336e09caa56b91efd9ff44d546a80d64770af259a 85992 grml-network_0.2.3.tar.gz
 d6130006cfb04160f90512b4a1b451e6a43aa686ed49feea4021a941099b245e 90826 grml-network_0.2.3_all.deb
Files: 
 416527b6c51b7a68c53ddad382d8ca03 869 grml optional grml-network_0.2.3.dsc
 3b5530269c1a209a0146e6c38391ec66 85992 grml optional grml-network_0.2.3.tar.gz
 d5d05a6c03cf2230e545d279e36ecf21 90826 grml optional grml-network_0.2.3_all.deb

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Package: grml-network
Version: 0.2.0
Severity: normal

Just dropping a quick line:

grml-network should depend on grml-etc-core because at least
grml-bridge uses '/etc/grml/script-functions' which can be seen here:

[1] http://hg.grml.org/grml-network/file/2eb237c4dea8/sbin/grml-bridge

Greetings,
 - Darsha

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.23-grml (SMP w/1 CPU core; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grml-network depends on:
ii  dialog                    1.1-20071028-1 Displays user-friendly dialog boxe
ii  psmisc                    22.6-1         Utilities that use the proc filesy
ii  zsh                       4.3.4-dev-5-1  A shell with lots of features

Versions of packages grml-network recommends:
ii  bridge-utils         1.2-2               Utilities for configuring the Linu
ii  nmap                 4.50-3              The Network Mapper
ii  pppoeconf            1.17                configures PPPoE/ADSL connections
ii  pptp-linux           1.7.0-2             Point-to-Point Tunneling Protocol 
ii  resolvconf           1.37                nameserver information handler
ii  uml-utilities        20070815-1          User-mode Linux (utility programs)
ii  vpnc                 0.5.1r254-1         Cisco-compatible VPN client
ii  wireless-tools       29-1                Tools for manipulating Linux Wirel
ii  wpasupplicant        0.6.1~git20071119-1 Client support for WPA and WPA2 (I
ii  wvdial               1.56-1.2            PPP dialer with built-in intellige

-- no debconf information