Comment 9 for bug 494608

In my case, I had one of the drives mounted. During the installation, I was asked if I would like to unmount the drive and chose yes. I chose the manual option for the partition manager. Shortly after choosing the partition to install Ubuntu to (choosing format type, checking off format drive, etc.) and clicking okay, Ubiquity crashed. At this point, there is nothing that can be done except to quit the installation process. If I restart without first mounting any drives, the installation works well, although halfway through the installation, there was a bad file (either to a bad disc, bad iso downloaded or some other cause).