Crap...this never happened before; I used a Memorex blank.
Well...here's hoping the next one doesn't fail. I don't like having to throw out blanks.
EDIT: I also have a problem with locking the drive for exclusive access. I have to restart my computer to start a burn, and even then I only have a few moments to find the files I'm about to burn, label them, and get the burn started before the drive is unable to lock. I try end any process I can find that might relate to it but it never works.