The installer attempts to find the best location for the bootloader. If
the installer environment has been booted from a USB disk, it will avoid
installing grub to it, installing to the target disk instead. That
said, if you're installing to a USB disk, the bootloader will be
installed to it as
** Attachment added: Casper.gz
https://bugs.launchpad.net/bugs/631943/+attachment/1551518/+files/Casper.gz
** Attachment added: Dependencies.txt
https://bugs.launchpad.net/bugs/631943/+attachment/1551519/+files/Dependencies.txt
** Attachment added: UbiquityDebug.gz
