Just FYI, RipIt 1.5.5 can't process this title (USA retail DVD). When I try, it fills up the disk with files. I gave up after a few hours, when the output directory reached 60 GB (instead of the predicted 7.9 GB).
It's a really simple form of copy protection. You can easily see what's happening in DVD Player.
Just use DVD Player to get to the main program. You will see it's title 15. This title allegedly has 35 chapters. But it doesn't! The credits start on chapter 33. Whatever it is that's on chapter 34 and/or 35 confuses RipIt and causes it to never finish.
Oh well, I'm sure one of the ripping companies will figure something out. But it probably won't be the RipIt people. They don't seem to update the app very often. Fortunately, so far the kids haven't asked for the movie to be put on the iPad, so I'm not in any real hurry.