[Bug 1282640] Re: ubiquity crashed with AttributeError in item_str(): 'list' object has no attribute 'find'

[CBrider]

I downloaded the AMD64 daily build of 14.04 today (Feb 21.) While
attempting to install he program I recieved this error. The installer
has not yet asked if I would like to install or try ubuntu. The computer
is an older AMD Turion Laptop with Raedon graphics. I am attempting to
instal from a USB that I built using the Ubuntu Startup Disk Creator.
Enough of the desktop did load so that I can use firefox to write this
report, and I see the sound and system-power (shutdown, restart) icons.
Let me know if you would like any other information.

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https://bugs.launchpad.net/bugs/1282640

Title:
  ubiquity crashed with AttributeError in item_str(): 'list' object has
  no attribute 'find'

Status in “ubiquity” package in Ubuntu:
  Confirmed
Status in “ubiquity” source package in Trusty:
  Confirmed

Bug description:
  Just booting on CD in attempt to install Ubuntu 14.04 i396 daily
  build, downloaded 20 feb 2014

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.17.7
  ProcVersionSignature: Ubuntu 3.13.0-10.30-generic 3.13.3
  Uname: Linux 3.13.0-10-generic i686
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: i386
  CasperVersion: 1.337
  Date: Thu Feb 20 15:33:02 2014
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  InterpreterPath: /usr/bin/python3.4
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140220.1)
  ProcCmdline: /usr/bin/python3 /usr/lib/ubiquity/bin/ubiquity --greeter --only
  ProcEnviron: Error: [Errno 13] Permission denied: '/proc/2371/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--greeter', '--only']
  SourcePackage: ubiquity
  Title: ubiquity crashed with AttributeError in item_str(): 'list' object has no attribute 'find'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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