Alright, here’s a list of changes to Chapters 2 and 3 of the Official Guide to the TOEFL (fifth edition).
Starting with Chapter 2 (reading):
Page 37: the book now mentions that you can skip questions and come back to them later.
Page 38: The 5th edition says there are 12-13 “Basic Information and Inference Questions” per set. The 4th edition said that there were 12-14.
Page 38: The 5th edition says there are 3-5 Negative Factual questions per set. The 4th edition said there were 3-6.
Page 38: The 5th edition says there are 1-2 inference questions per set. The 4th edition said there were 1-3.
Page 38: The 5th edition says there are 3-4 vocabulary questions per set. The 4th edition said there were 3-5.
Next, lets move to Chapter 3 (listening):
Page 127: There is a slightly different explanation of the answer to the sample type 3 question.
Page 132: The tips for solving the organization questions are phrased slightly differently.
Page 139: Some 1990s style hair and clothes have been removed from the picture.
Page 140, 150, 157, 161: The “why does the professor say this” question has been moved to the end of each practice set. I’m told that this is how the real test is currently designed.