[karmic] ubuntu-vm-builder crashed with AttributeError in preflight_check()

happens everytime i run 'sudo ubuntu-vm-builder kvm <release>' with all supported releases.

ProblemType: Crash
Architecture: i386
Date: Tue Jun 30 23:01:32 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/ubuntu-vm-builder
InterpreterPath: /usr/bin/python2.6
Package: ubuntu-vm-builder 0.11-0ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/ubuntu-vm-builder kvm jaunty
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-1.13-generic
PythonArgs: ['/usr/bin/ubuntu-vm-builder', 'kvm', 'jaunty']
SourcePackage: vm-builder
Title: ubuntu-vm-builder crashed with AttributeError in preflight_check()
Uname: Linux 2.6.31-1-generic i686
UserGroups: