The entire PQ, over 100, crashed the server about 12:22 CST. No one got credit for the dragon kill and the body went missing. All day weird stuff happened. No announcements, two dragons in a row, simultaneous spawning locations, etc.
This is also happening on Maj'Dul. You get too many people in the zone, with all their harvest ponies, familiars, fluff pets, and mercenaries and it overloads the zone and the zone crashes and you are SOL for that kill. Try at off hours and during the week. Also remember that the even runs until December 5th, so you have some time yet.