Dunno. I double-checked the whole thing and out of 46 of them, the first 40 perfectly match the original copy in every minute detail, far as I can tell.
All 5 (did I say 4 earlier?) deviations are in the last 6.
3 of them are "picky" things that likely wouldn't be noticed by most people, but my experience in two different "careers", one of which had me proofing type-written stuff all the time and the other of which had me grading it means I notice the little stuff.
The other two ("whels" and "day trading" vs "trading day") are a little less easy to overlook.
The "whels" one is the one that comes closest to bothering me.