Saving and loading should now (r273) work.
The only problem I've run into so far is that changes to chests, furnaces and signs don't get saved unless the terrain in the same chunk is changed in some way, too. I haven't yet found a way to mark the chunk as dirty when the player is using any block-entity window.
The only problem I've run into so far is that changes to chests, furnaces and signs don't get saved unless the terrain in the same chunk is changed in some way, too. I haven't yet found a way to mark the chunk as dirty when the player is using any block-entity window.