Comment 5 for bug 285713

Personally I think you're right Antoine, this IS a bug and not just a
problem created by myself. The operations are simple:

STEPS:
1. Insert a USB drive into your computer or laptop.
2. Run "Create a USB startup disk".
3. Select an ISO disc image of an Ubuntu Operating System (for example).
4. Select or confirm your USB key in the bottom section and make sure it has
enough space (I use empty 4GB sticks).
5. Optionally, set Documents and Settings size or turn this option off.
6. Click Create or whatever it is.
7. Theoretically, when operation is finished you should have a fully
functioning bootable USB stick with an Ubuntu installation on it ready to be
inserted into a machine and booted off.

REALITY: When process is finished the USB key is not bootable on machines
that can boot from USB sticks. GRUB Error 17 appears immediately during boot
process.

This suggests to me that this programme to the ordinary user, while easy to
use and difficult to make mistakes does not in fact create successful
bootable USB sticks and that is a bug.