Comment 2 for bug 896490

Exception during installation:
Nov 26 00:18:49 ubuntu plugininstall.py: Traceback (most recent call last):
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Nov 26 00:18:49 ubuntu plugininstall.py: install.run()
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Nov 26 00:18:49 ubuntu plugininstall.py: func(self)
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 210, in run
Nov 26 00:18:49 ubuntu plugininstall.py: self.remove_extras()
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1404, in remove_extras
Nov 26 00:18:49 ubuntu plugininstall.py: if self.db.get('apt-setup/restricted') == 'false':
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 60, in <lambda>
Nov 26 00:18:49 ubuntu plugininstall.py: lambda *args, **kw: self.command(command, *args, **kw))
Nov 26 00:18:49 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 81, in command
Nov 26 00:18:49 ubuntu plugininstall.py: status = int(status)
Nov 26 00:18:49 ubuntu plugininstall.py: ValueError: invalid literal for int() with base 10: ''
Nov 26 00:18:49 ubuntu plugininstall.py: