I have the same problem with my FarScape DVD's. Granted their are odly encoded, some having only titles, 72 at that. Some files do play just fine in both oogle, vlc, mplayer etc.
however since the last version of libdvdread is from even before this thread, and it really is libdvdread's fault (errors cracking CSS encryption) this is where to look for problems.
Since I haven't solved this one myselfsome (on 2 systems with 2 dvd players/burners) and no go.
Just giving this thread a bump since it's now 2007 and still got the problem