While installing Yosemite, I checked the box to enable File Vault. The installation proceeded perfectly. However, when I re-started my Macbook Air, my computer opened to a login screen. I had to enable Voiceover (Cmd F5) to read the screen. However, I could not move the VO cursor to the Name and Password fields. I had to get sighted assistance to login.
I am now in the process of turning off File Vault.
Has anyone else encountered this problem?