DVDFab should handle the disc fine on its own. Yes, bad idea to run both. Egads... why? As for the problem... I have to rule out a media issue, personally, from my experience in some simple tests.
For the heck of it I tried 4 different things:
(1) Ripped the disc to my HDD and compressed to DVD-5 using DVD Shrink & AnyDVD 6.1.7.5 beta. The resulting output on my HDD had stuttering video, freezes, overly sped up video, missing audio and out of sync audio. TheaterTek DVD 2.5.10.0 was used for playback.
(2) Attempted to rip the disc to my HDD using Nero Recode & AnyDVD 6.1.7.5 beta. Not possible. Nero Recode errored during import.
(3) Ripped the entire disc to my HDD using the AnyDVD Ripper 6.1.7.5 beta. The resulting output played back flawlessly using TheaterTek DVD 2.5.10.0.
(4) Ripped the entire disc to my HDD and compressed to DVD-5 using CloneDVD 2.9.1.2 and AnyDVD 6.1.7.5 beta. The resulting output had no video or audio issues. TheaterTek DVD 2.5.10.0 was used for playback.
Something to note is some info in the CloneDVD status window when ripping and the AnyDVD Ripper also probably handles this when it is used.
So, yeah, people can play around with other programs like Nero Recode, DVD Shrink, etc but double check the results. This issue probably is specific to discs with a corrupted file system [ProtectDVD protection]. Of course as has been said many many times this was a private beta and should not be viewed as a 100% stable release. It's great but it's not complete yet. Any problems that occur are the responsibility of the person using the software.