ubiquity crashed with DebconfError in command() ; DebconfError: (10, "oem-config/remove_extras doesn't exist")

Binary package hint: ubiquity

Installing from the daily media for 4-03-10, the installer progress bar almost made it all the way to the end, and then the ubiquity window disappeared and I thought that the dialog asking if you want to restart was going to come up, but ubiquity had crashed. From the trackback it looks like the error has to do with oem config. This error reported by the python traceback is: DebconfError: (10, "oem-config/remove_extras doesn't exist"). Lots of bugs look duplicate to this one until you look at the trackback. Apparently, extra package removal was interrupted and the user's folder doesn't have all the default folders yet.

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: ubiquity 2.2.13
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic x86_64
Architecture: amd64
Date: Sat Apr 3 19:53:58 2010
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100403)
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/32104/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with DebconfError in command()
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