I couldn't find a thread that explicitly had this question answered, so I made one. Regardless of plugins (I know that some may work, some may not), is my map safe to update to 1.1? I've read that existing, pre-generated swamp biomes' transitions will be smoothened. I've also read that the existing pine biomes will have snow. Will all of the pine biomes on my map have snow? What about the rest of the biomes? Around 1.6 or so, I updated my map and every single biome got thrown around. I had lakes ice over, deserts start snowing, and snowy places melt and turn into desert-y areas. Will only the swamp changes and pine->snowy pine changes occur?