Comment 1 for bug 749671

If the install is done while connected to the internet it will attempt to figure out where you are and what keyboard you are using, and it gets it right for me (en_GB) if you don't let it connect to the internet you get the US keyboard with no £ and @ and " the wrong way round. We can update the a11y documentation to strongly recommend installing with a network connection as a workaround for this.