[WoA] Rules revised, but which?

1 post / 0 new
Bought Wrath of Ashardalon board game just recently, read through all the rules and decided to download the rules as PDF from Wizards so I could have it on my phone as well. Then I realised the PDF version is noted as REVISED at the bottom of the page. Anyone know if there are some important changes I should know about or if it's merely cosmetic changes like formatting and spelling errors? I am guessing they have thrown in some clarifications since they have released at least two FAQ's. 
Anyone noticed any important changes I would miss if I'm only using the "old" manual that came in the box?

Thank you for reading!

Yours in haste
Sam Ferdinand