As mentioned in another thread, the graphics changes in 4.0.1 has some unfortunate side-effects, at least on my system.
This is only observed in the print preview, and it shows itself as very pronounced moiré-patterns when rotating the model. Using the Moon City model as an example (sliced at 0.2 mm layer height, 3 perimeter, 3 top and 3 bottom layers), here's how it looks in 4.0.1 in the side view:
And the same model and same view in 4.0.0:
My system is Win10 anniversary edition, Nvidia 388.13 drivers and a Geforce GTX 1050 ti graphics card.