It says in the changelog to report anything strange with the new progress dialog changes.
I tried this on purpose as it was a little buggy with the old progress bar but it worked after a few seconds. Create a population of rocks, smooth normals, 2000 faces(to create a population of spheres). The single rock loads fine with the progress timer showing for a second or two.
When I hit populate TG has an infinite hang and whites-out asking to be terminated. Before, the progress bar would repeatedly reload about 5-10 times in quick succession and then the object would be ready.
That's all.
In other news, ray detail multiplier, unique variations and .obj export, those are great!