ubiquity crashed with ValueError in command(): I/O operation on closed file

[Omer Akram]

I am trying to install http://cdimage.ubuntu.com/daily-live/20111125.1/ but can't as I cannot edit partitions.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.4
ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2
Uname: Linux 3.2.0-1-generic x86_64
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CasperVersion: 1.291
CrashCounter: 1
Date: Fri Nov 25 19:49:10 2011
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111125)
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/3273/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with ValueError in command(): I/O operation on closed file
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: