So now I have to call Dell and get them to replace it. Grrrr.
Edit: My suspicion about the lens being fucked up was correct. Compressed air wins. Also, Dell wins for providing useful information in their automated email responses for once -- I didn't think compressed air and lenses mixed, but apparently I was wrong. >.>
It's managed to burn a CD correctly. Let's see if it can do it again.
Edit Again: No, it couldn't. Time to poke Dell again.