[MC-47864] Just some info about. Converting World

Converting World. Is a upsetting bug. in Minecraft 14w06b.

For some reason FLATWORLDS are affected. I found out that ocean biome was not affected but PLAINS was.

Linked issues

Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".