"Stone Floor" and "Ironstone Brass Decorated Floor" are not aligned.

The "Ironstone Brass Decorated Floor" texture is identical to the "Stone Floor" texture in the dwarven expansion set, except it has the brass decoration on top. However, the stone bricks do not line up in size and/or offset.

It would be very useful for them to line up perfectly, as you could use decorated floor texture to create one section of brass on a stone floor, or use the stone floor texture to erase small sections of the brass.

(Stone floor brightened for contrast in the screenshot)