ubiquity-dm crashed with OSError in _execute_child(): [Errno 2] No such file or directory

[linuxonbute]

This came up on booting and running a Live instance. Not on an install or an installation

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CasperVersion: 1.287
Date: Fri Nov 4 14:06:38 2011
ExecutablePath: /usr/bin/ubiquity-dm
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: /usr/bin/python /usr/bin/ubiquity-dm vt7 :0 hostname /usr/bin/ubiquity --greeter --only
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/ubiquity-dm', 'vt7', ':0', 'hostname', '/usr/bin/ubiquity', '--greeter', '--only']
SourcePackage: ubiquity
Title: ubiquity-dm crashed with OSError in _execute_child(): [Errno 2] No such file or directory
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[dino99 (9d9)]

This version has expired for some time