ubiquity crashed with RuntimeError in progress_loop()

[Paulos]

Binary package hint: ubiquity

When installing Ubuntu 9.10 daily build, an error appears after the formating step (not sure where exactly).

ProblemType: Crash
Architecture: amd64
Date: Thu Jul 2 18:22:25 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Alpha amd64 (20090702)
Package: ubiquity 1.13.7
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/4493/environ'
ProcVersionSignature: Ubuntu 2.6.31-1.13-generic
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with RuntimeError in progress_loop()
Uname: Linux 2.6.31-1-generic x86_64
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