Comment 3 for bug 1067566

While we might have fixed usb sticks installation. Manual partitioning is now having woes.

Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: Exception in GTK frontend (invoking crash handler):
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: Traceback (most recent call last):
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1390, in on_next_clicked
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: self.dbfilter.ok_handler()
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: File "/usr/lib/ubiquity/plugins/ubi-partman.py", line 3089, in ok_handler
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: self.preseed('grub-installer/bootdev', self.ui.get_grub_choice())
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: File "/usr/lib/ubiquity/plugins/ubi-partman.py", line 580, in get_grub_choice
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: disk_fields = disk_string.split(None, 3)
Oct 17 00:32:16 ubuntu-studio ubiquity[14369]: AttributeError: 'NoneType' object has no attribute 'split'