I don't know yet. I wanted to have more music on the disc so I tracked that clip down online. I don't think (read I'm not absolutely certain) that with display devices today that the NTSC v PAL compatibility is crucial. Most display devices will "re-handshake" in the event of a signal change.
If you notice at the top of my list, in red, are two items marked because their FPS differs from that of 23.976. In my early testing, this meant that my projector would "re-handshake" when those clips come up. The clips and disc authoring were fine. Those clips won't make the disc because they are short. I've presumed, although not tested, that the KORN track will do something similar, but at the length of a full song, it's OK, IMO, for a "re-handshake" to take place.