Doesn't the US version only affect BluRay capabilities? Sounded like this person might be trying to rip the DVD, maybe he or she can clarify.
I have the non-US version of the latest beta myself and I'm definitely having issues making a back up. It throws read errors when it scans, though the disc has no scratches. When it does get through scanning, it's telling me that the full DVD has something like 96GB of data. When I rip the main movie with DVDFab, the tail end of the movie is unwatchable. Lots of little pauses until you can't see anything anymore.