By default, the boxes for file vault and use apple ID to make changes to file vault are checked in the setup process. I noticed during the beta builds that after the installation, you are not given a vault key. Is this a bug or how it is supposed to be? If person were to forget their password or have some kind of software glitch that prevented it being recognized, it looks to me like they are out of luck without the vault key. The only way to get a vault key (that I noticed) was turning the vault off and turning it back on in preferences. After it gets done, it will give you the key.