Corrected entry: Chapter two says "The schools strictly enforced dress code required that all student avatars be human, and of the same gender and age as the student." However, Aech does not follow this rule (will not specify due to spoilers) with no punishment.
Corrected entry: In chapter 28 Michael Wilson comes in to take out 'Bryce'. On page 270 about the middle of the page his I.D. starts with a 4 not a 6. All IOI employees ID's start with a 6 in front, not a 4.