Some things I have found that weren't listed in the guide:
Westeria Castle:
Extra 250 G loot in the Ballroom.
(I haven't compared the found loot for Towerhold, Lowtide and Westeria + Sewers)
Also the 2nd and 17th page of the guide are unreadable because the text flows next to the picture.
Edit:
Small Bug 1: Damza should have learned Heal II at level 8, but that skill isn't there.
Small Bug 2: The Healer's Badge never protects against status ailments.
Small Bug 3: The Main Quest "The Third Seal" has already failed when you obtain it (or when you learn about its location).
Small Bug 4: Calder should learn Heal II at level 22, but that skill isn't there again.
Big Bug 1: On the Map Skyscourge 1F is at least one chest and mob not reachable. I have even searched for another stairs. The area is somewhere in the North-Central part of the map.
I will watch out for more inconsistences.