The quarantine on T2A only creatures has finally been lifted. Ostards and other "unique" animations are now free to travel to the old lands. You may now recall directly from T2A towns to old lands towns and vice versa. Also, the recalling off of runebooks bug with ostards has been fixed.
Monsters will now break barriers again. No more using chests to tame pets. No more blocking monsters near the dungeon entrances. This should solve most of the exploits being used to tame high level creatures.
Elementals or other creatures that did not previously drop a corpse will now have dead slimes as their corpses. Will be very nice, since it eliminates the game of who can snatch the loot the fastest.