Jackd suggests automatically generated command line containing a bug

[Cefn]

When triggering jackd through qjackctl I encounter the following warning about a change to the configuration which I need to make. However, it appears to have tried to auto-detect my username and failed. Note the usermod invocation contains the username (null)

Executing the suggested command line would cause the error...
bash: syntax error near unexpected token `('

Here is the relevant output from jackd.

jackd 0.118.0
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK is running in realtime mode, but you are not allowed to use realtime scheduling.
Your system has an audio group, but you are not a member of it.
Please add yourself to the audio group by executing (as root):
  usermod -a -G audio (null)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: jackd 0.118+svn3796-1ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
NonfreeKernelModules: wl
Architecture: i386
Date: Sat Jun 12 16:37:59 2010
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: jack-audio-connection-kit

[dino99 (9d9)]

Closing that outdated report as EOL has been reached long time ago