I notice the same thing from time to time. You will probably do best if you get DVD movies that are labeled "wide screen." But, even then, we have had movies that have black bars on the top and bottom.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV