Since my laptop HDD died last week I’ve been using a USB flash with Lubuntu 13.04 with persistance, and several other live distros.
I’ve found something annoying, like after each boot (even with persistance enabled) I need to change my keyboard map to Portuguese.
Typing
$ setxkbmap -v pt
in the terminal does the trick. -v parameter is opcional verbose mode, and pt is my keyboard layout (change it to your language). This simple command is quite usefull across many distros