That's the title of a Symantec KB article. It's true. I got the biometrics software from Broadcom, which is supplied by Dell for their fingerprint reader on Latitude E6230. Following the instructions here after a system rebuild due to a bad BSOD, I was able to get the biometrics set up and working (seemingly), or so I thought. Then it broke down. What happened was, when a fingerprint was scanned correctly, the fingerprint icon just disappeared from the login screen without letting me in. It's almost hilarious. So, having a full-disk encryption for now prevents me from using fingerprint as authentication.
What's worth mentioning is that, before I had the fingerprint setup working, then had full-disk encryption retrofitted in, the fingerprint setup stayed working. This time around encryption is in first, and they could no longer work together.