I played just fine on the single player version and now i want to move that world to a multiplayer server so that my friends can help me build the world. The problem is that when I move the world over to the server, it says that I'm missing copper and tin ores.
The server log is found here...
https://docs.google.com/document/d/1CRHljzYLjFUib63mKAx0RTTWW-ApgFudKBjgYhx6esE/edit?usp=sharing
I'm running Xubuntu 14.04, Java 1.8.
I've confirmed it before and it gets rid of those blocks in the game.