I recently upgraded ArcGIS Earth from 1.8 to 1.9. Using the mouse wheel to zoom in and out on the map was very smooth in version 1.8. Now, in AE 1.9, the mouse wheel zoom experience is stepped and choppy. I have installed AE 1.9 on two computers that have different graphics capabilities and I experience this behavior on both machines. Is there a setting in AE that I am missing to get the smooth zoom behavior I had with v1.8, or is this the new expected user experience?