Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/usbcreator/gtk_frontend.py", line 432, in install
    self.backend.install_bootloader()
  File "/usr/lib/python2.5/site-packages/usbcreator/backend.py", line 461, in install_bootloader
    self.frontend.failed('Error installing the bootloader.')
  File "/usr/lib/python2.5/site-packages/usbcreator/gtk_frontend.py", line 84, in failed
    self.backend.shutdown()
  File "/usr/lib/python2.5/site-packages/usbcreator/backend.py", line 520, in shutdown
    if self.pipe:
AttributeError: Backend instance has no attribute 'pipe'