Guss2, do you know where can you get that problem fixed (I've had the same problem on a number of discs, almost as though the laser doesn't get the cue to stop reading)? It is a great way to clean out the system with pink noise, but it is a bit jarring to say the least!
Other than that, there were early problems with the SCD-1 and 777ES relating to the sled motor, but a good cleaning fixed that problem in many cases, including mine.