Expanding the dimentions of a tileset for an existing map without it breaking horribly?

Questions
3

Just a heads up that this bug was fixed in Tiled 0.16.2.

But, those using the terrain tool should be aware that there is a related issue with the terrain information getting messed up, which isn’t fixed yet. If this affects you be sure to follow this issue:

https://github.com/bjorn/tiled/issues/1315