other things to note in world builder:
* the corner snap tool doesn't work on new objects. the guide tool displays at a random point.
* you can no longer change the texture of a group of items with one click, every single piece in that group now needs to be changed individually.
* the snap step distance cannot be changed from its original setting. you can input a new number, but the program doesn't register the change.
all of these things were broken in the beta, and I've seen them reported. they are still broken.
they may seem like minor things, but they increase the busy work by a heck of a lot.