I am having the same problem. Running in 1920 x 1080, the default preview window screen does not work when you open it.
The display part of the preview screen is zoomed in close on what is the top left part of the object which is often empty space for most objects. But all of the camera/mouse moving options for the object is based on a camera center that is way outside of what you can see. That means that zooming or moving the camera consistantly moves the object outside of the area where you can see, making it imposible to propolerly use the window.
Trying to resize the window, the display area is unable to properly adjust to the new resolution. When you can see the object the aspect ratio is messed up, and making the area even larger can result in two or three seperate images of the preview object to show up distorted in the display area.
Is there any where they have addressed this issue yet, or any one who knows how to fix it?