I like setting the jump on playback to none. This way, starting a DVD doesn't take over the screen but just uses the small display window unless I want it to be full screen.
If this option is set and I start a DVD, a new taskbar item opens for each item called "Media Center DVD Pla..."
A new one opens each time a DVD is started. I can safely right click > Close these...but they are obviously annoying. Also, a small window, about the same size as the Display view, appears in the upper left corner--it is a solid black box.
Also, in the display window, the video will playback filling the space rather than keeping its aspect ratio. Any way to fix this?