Some new movies such as resident evil, apocalypse (if I spelled that right) have copy protection based on bad sectors. They intentionally put bad sectors that will make your drive slow way down trying to read them and will often make your copy program fail due to errors. Turning it on will make anydvd replace these unreadable sectors with dummy sectors (I wonder if this would help with a scratched/damaged disk that has unreadable sectors, if the content is not replacable).
Its a giant pain in the ass because you cannot even play it on your computer without installing thier software and who knows what thier software does. We know that they have programs that will scan your computer for copyrighted content and I have heard of someone getting a virus that tried to send that information out over the web (no proof that the virus came from the mpaa but it is probably one of they lackeys).
While stand alone players usally do ok skipping over minor errors, I wonder if this will make it unplayable on some players. You might be beter off using a copy with the bad sectors removed than the original. Anybody else have coments on that?