Account doesn't appear on login screen

Hi,

I added an account to my computer using Migration Assistant. When I boot my computer, the new account does not appear in the list of available accounts. However, if I log in with one of the other accounts, I can then log out and switch to the new account, as long as I do not reboot.

I do have FireVault enabled, but I explicitly gave the new account access to unlock the disk. The new account is also an administrator.

What is causing this and how do I fix it?