I took advantage of Fantasy Flight's sale of 3rd Edition WFRP stuff and bought quite and abundance of wonderful goodness.
Sorting through it brought a question to my mind though: If I have 2 (or more) decks of Wound or Disease decks, due to having a full set and a Game Masters Vault, does it create a problem mixing them?
Is there some kind of specific frequency of occurance that the individual cards are supposed to have that is ruined if you have doubles of say the base set but only one set from somwhere else?
I actually built a custom deck of wounds for my players to draw from using the two base sets (one from the Core box, another from the GM's vault), and the extra cards included in Omens of War. To do this, I simply thumbed through the cards and took out a number of duplicates to increase the variety and flavor of Critical Wounds. With the rest of the cards I built a wound deck for myself to keep behind the GMs screen. Though NPCs and baddies don't sumemr from Crits, I still draw from the deck to track basic wounds (I find the chit/token method to be tedious).
Hope this helps.