I have not noticed this one being posted before, so if it was, I am sorry for repeating it. Today I have first gotten my hands on the Dash-8 DLC and noticed a rather interesting problem with the new hoppers. Every single hopper has the same number - 834967. This probably wouldn't be that much of an issue normally, but random number generating on cars and locos is already a working feature in the game. (This happens to all sides of the hoppers, even the small numbers on the fronts are the same)
This is basically a nitpick, so I'm just going to throw it in here, but engineer's and secondman's speedometers don't match (secondman's shows about 5 mph more, engineer's works fine)