"An uncaught exception was raised:Invalid version string 'GNU/Linux'" when creating bootable USB stick

Still unsolved bug here and bug -report here, bug in 12.04 and apparently in many other versions. How can I create an bootable USB -stick with Ubuntu?

You could try using UNetbootin, the Ubuntu package is called unetbootin.

I have no idea what is the problem with the GUI -wrapper but this should work in Ubuntu, it works in Debian.

Check up the sdNUMBER and then as a root overwrite the stick, be sure that you overwrite the right stick!

$ dmesg|grep sd|less
# cat debian.iso > /dev/sdX
# sync

More here.

Example: notice like sdb, not like sdb1

    $ sudo su
    # root@xyz:/home/xyz# cat /home/xyz/Documents/Distros/debian-6.0.5-i386-netinst.iso >/dev/sdb

For any Linux , Make Boot able USB drive with Unetbootin. Provide .iso image path and click write. ( Don't need to select even Linux and versions).

This worked in my case:

sudo dd if=ubuntu-14.04.2-desktop-i386.iso of=/dev/sdb