Comment 2 for bug 1154910

Exception during installation:
Mar 14 01:42:08 backbox plugininstall.py: Traceback (most recent call last):
Mar 14 01:42:08 backbox plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 260, in start
Mar 14 01:42:08 backbox plugininstall.py: self.db.progress('START', 0, 100, self.title)
Mar 14 01:42:08 backbox plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 60, in <lambda>
Mar 14 01:42:08 backbox plugininstall.py: lambda *args, **kw: self.command(command, *args, **kw))
Mar 14 01:42:08 backbox plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 81, in command
Mar 14 01:42:08 backbox plugininstall.py: status = int(status)
Mar 14 01:42:08 backbox plugininstall.py: ValueError: invalid literal for int() with base 10: ''
Mar 14 01:42:08 backbox plugininstall.py: