Sometimes when I start my Ubuntu 13.10 computer the keyboard layout doesn't match the only one which is installed and selected on my computer.
I only have the UK keyboard selected but sometimes when I start up the @ and the " key are in the wrong place. When I check in system settings the UK Keyboard is correctly selected.
The only way to get this error to correct itself is to Log Out and back in again.
I don't touch the keyboard settings and when it starts up again the keyboard layout is correct.