Turns out the answer is: turn off file vault; reboot; turn off guest user; reboot again; turn on guest user.
If you don't do all of that, the guest user goes into some horrid, kiosky "I am an iPad instead of a computer" mode.
Turns out the answer is: turn off file vault; reboot; turn off guest user; reboot again; turn on guest user.
If you don't do all of that, the guest user goes into some horrid, kiosky "I am an iPad instead of a computer" mode.