Did you do anything other than decrypt and rip with DVDFab? In other words, did you change formats or compress the DVD while ripping?
If it was a straight rip without anything else being done, it appears to be an error in the ripping process.
I might try another decrypter/ripping program to see if this is the case. TDMore Free DVD Copy should work for this test: http://www.tdmore.com/free-dvd-copy.htm
Or you could use the free trial of AnyDVD.
What did you use for playback?