ubiquity crashed with AttributeError in on_advanced_button_clicked()

[Nicolas DERIVE]

Binary package hint: ubiquity

Seems that this crash is here again. Occurs with latest (17-02-2010) lucid live cd between last two steps of installation.

ProblemType: Crash
Architecture: i386
Date: Wed Feb 17 13:05:06 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100217)
Package: ubiquity 2.1.20
ProcAttrCurrent: unconfined (enforce)
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission non accordée: '/proc/4728/environ'
ProcVersionSignature: Ubuntu 2.6.32-13.18-generic
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with AttributeError in on_advanced_button_clicked()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/ubiquity/plugins/ubi-summary.py", line 152, in on_advanced_button_clicked
     self.set_summary_device(self.grub_device_entry.child.get_text())
 AttributeError: 'PageGtk' object has no attribute 'set_summary_device'
Uname: Linux 2.6.32-13-generic i686
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #522875, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.