ubiquity crashed with AttributeError in on_advanced_button_clicked()

Binary package hint: ubiquity

crashed when installing kubuntu from live cd inside kubuntu; after 7th page, just before the installation process after clicking next.

kubuntu 9.04 (jaunty jackalope) daily build (development branch)
http://cdimage.ubuntu.com/kubuntu/daily-live/current

jaunty-desktop-i386.iso 05-Mar-2009 05:27 678M Desktop CD for PC (Intel x86) computers (standard download)

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
Package: ubiquity 1.11.14
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity kde_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/7520/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'kde_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with AttributeError in on_advanced_button_clicked()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 2007, in on_advanced_button_clicked
     unicode(self.advanceddialog.grub_device_entry.text()))
 AttributeError: text
Uname: Linux 2.6.28-8-generic i686
UserGroups: