My Mac Mini will not rip any DVD. Handbrake errors out with a "No Valid Title Found" and MacTheRipper errors out stating "bad sectors". I've had the DVD drive replaced and reinstalled OS X, same thing. However, using the same exact versions of the software I stated on my Intel iMac, I'm able to rip any DVD.
Why and how can my Mac Mini be locking out my ability to rip DVDs? The DVD/CDRW drive works fine otherwise. I'm able to burn CDs and watch DVDs with no problems.