Fixed a bug in DungeonPack that would trigger a rare ClassCastException during dungeon selection. We were comparing instances of DungeonType against WeightedContainer<DungeonType>. This wouldn't break dungeon generation because DD falls back on selecting a random dungeon if rule-based selection fails. It would allow duplicate dungeons to appear in the same chain, though.
DimDoors
Dimensional Doors for Minecraft Adds several items that allow the player to move between and create dimensions
see the MC forum topic for details