as the title states, projectiles that travel over stairs causes the stairs to disappear
not sure if the type of projectile has anything to do with it but I used carbon fiber arrows to shoot a zombie dog in the shelter Im using as a base an now there are no longer stairs to the basement
reloading does not fix the missing stairs
I believe the version Im using is the night before when this was posted 2/17/14 no idea where to get the version number thing