Ah, I shouldn't rush a release or make last minute fixes. When will I ever learn?! I did some minor adjustments to the Halls of the Goblin King but I accidentally lost the spawn point for the Goblin King himself, thus resulting in player's not being able to finish the game. Luckily it was spotted and reported fast so the number of affected players shouldn't be that high. Still, it's embarrassing... sorry guys!
New in this release:
#433 Unique artifacts cannot be enchanted
#434 Add poison immunity to the Rat Hunter's Cloak
#437 Fix incorrect error message about quests not being completed properly when entering the training grounds
#438 Fix Goblin King spawn point
Source and comments: http://www.dwellergame.com/2012/08/dweller-1222.html