AGOD v1.01
I target a wooden block with the dig order.
1 left click.
This is what happens:
A dig order targeted on wooden blocks or any bridges falls through and targets the next legal (but hidden) tile that it can find anywhere below.
The tooltip visible on the first screenshot is the only indication of something screwy going on because a wooden block is obviously not "fertile ground".
You only get this "hint" if the actually targeted tile is non-dirt and it's type known to the player.
I target a wooden block with the dig order.
1 left click.

This is what happens:

A dig order targeted on wooden blocks or any bridges falls through and targets the next legal (but hidden) tile that it can find anywhere below.
The tooltip visible on the first screenshot is the only indication of something screwy going on because a wooden block is obviously not "fertile ground".
You only get this "hint" if the actually targeted tile is non-dirt and it's type known to the player.