Comment 3 for bug 614573

Exception during installation:
Aug 6 20:19:34 ubuntu python: Traceback (most recent call last):
Aug 6 20:19:34 ubuntu python: File "/usr/share/ubiquity/install.py", line 2566, in <module>
Aug 6 20:19:34 ubuntu python: install.run()
Aug 6 20:19:34 ubuntu python: File "/usr/share/ubiquity/install.py", line 418, in run
Aug 6 20:19:34 ubuntu python: self.configure_bootloader()
Aug 6 20:19:34 ubuntu python: File "/usr/share/ubiquity/install.py", line 1681, in configure_bootloader
Aug 6 20:19:34 ubuntu python: self.db.input('critical', bootdev)
Aug 6 20:19:34 ubuntu python: File "/usr/lib/python2.6/dist-packages/debconf.py", line 65, in <lambda>
Aug 6 20:19:34 ubuntu python: lambda *args, **kw: self.command(command, *args, **kw))
Aug 6 20:19:34 ubuntu python: File "/usr/lib/python2.6/dist-packages/debconf.py", line 86, in command
Aug 6 20:19:34 ubuntu python: status = int(status)
Aug 6 20:19:34 ubuntu python: ValueError: invalid literal for int() with base 10: ''
Aug 6 20:19:34 ubuntu python: