Technology previews are about feedback. When working with a photo scene in the Photo Scene Editor, a few of you have gotten stuck in "photo locked mode" when trying to orbit around your 3D models. You can tell you are photo-locked when you try and spin and the system "snaps" you back to a photo-orthogonal view rather than allowing a free spin. You get into locked mode when you double click on a photo in the tray of photos at the bottom. To get out of locked mode:
hit the space bar
right click in the main window and select the unlock option.