Simon Marti

Building limitations

2

It is currently possible to dig blocks miles away from the player and to build blocks onto air.  This structure was built from the spawn point but is actually...

Generating block metadata when placing

3

Many blocks like stairs, levers, ladders, chests, etc. require the server to store their direction as metadata. The direction is usually derived from the direction the player looks.

Signs

1

It's currently not possible to place any signs, they don't appear for other players and disappear when reconnecting.