MTR works fine on the new ARccOS discs for most users. The 'bad sector' errors are normal for ARccOS discs, and we're probably going to get rid of those in ARccOS modes in the future. Don't worry about that. As for ARccOS discs completely failing to rip, it seems that some drives are either incredibly slow or just plain unable to deal with ARccOS DVDs and their bad sectors. There's nothing we can do about that, since we're forced to use the OS's drive access (IOKit), and that has limitations that we can't do anything about. If you can't rip an ARccOS disc, you can try sending it in to us, and we can see if you have a strange release that won't rip on any drives (in which case we can probably fix the problem in MTR), or if it's just your particular drive that can't handle these discs. Contact us at mtr@ripdifferent.com if you want to get info on how to send your problem discs to us, and we'll return them when we're done. If you have several DVD drives, try using a different one. If not, try letting it rip overnight, and see if there's any progress. Otherwise, there's nothing we can do about some drives refusing to skip over bad sectors.