There definitely seems to be a Mavericks/Lightscribe incompatibility. I'm using a Matsishita external drive with my early 2011 MacBook Pro, and no luck either. Whilst the system recognises the drive, the drive will not recognise any blank Lightscribe disc and just keeps spitting it out. Everything works fine on the same machine under Windows XP if I go over to the Bootcamp side side of things. Oh well. We can only hope that the Lightscribe powers-that-be see fit to address this.