Perhaps it's one of those discs that loads some anti-copy driver sliently via autorun and then messes with your DAE.
Though I would like to get one of these discs and try to break the copy protection just for fun. I would think that a Plextor using single session mode could cut through it without problems.
It sounds pretty clever though, considering you have to listen to the whole disc before you know for sure that it doesn't have defects like this. But my hypothesis at this point is that it's just that - a 'clever' implementation of an existing type of copy protection.