It's just presenting the movie how it's on the disc. If you want to zoom and crop off part of the image, you can using your TV's zoom feature, or mess with the player preferences and see if it can also zoom and crop. Movies that already fill your screen have just had the cropping already done, losing part of each frame of the movie essentially. By presenting it the way they do w/ the bars, you can decide if you want to crop it or not yourself, so have at it if you don't like the bars.