In case ya'll didn't know - Blizzard put in a stealth change so that every raid ID has different drop rates for each boss and for each item. Those drop rates also change from week to week and they change depending on your raid comp. They also change the drop rates based on how often you make a retarded post on a WoW forum. They love to keep us WoW players on our toes never knowing what could drop and when.
/end sarcasm