Dirt has got the wrong colour when replaced. If i dig out dirt on the starting planet and then place it again, it has a different colour than the original one. This really looks bad and i hope this is a bug, since there was a poll where people clearly voted against unicoloured dirt. This is bad for all builders and is a huge kick in the n*** for the immersion of this wonderful game. And no, the colouring tool is not a viable substitute.