I just found a typo in the MasterExam that's on the CD included with the K&B book. The errata doesn't list anything from the MasterExam simulator.
The typo I found is on the question about selecting which java command to successfully run a MusicPlayer project. The MusicPlayer class is in the player package, and its .class file is both in the folder /mp/classes/player, and the jar file /mp/jars/mp.jar. One of the correct answers the test lists is "java -cp /mp/jars/cp.jar player.MusicPlayer" !