I have a 720x480 letterboxed mpeg. When I load it into divx and view list, it says the resolution is 720x528. I double checked with gspot, it's 720x480. If I convert it as is, there is a thick black bar at the bottom of the screen, nothing on top. If I modify the file in view list, checking Use Custom Resolution, and moving the sliders so that they say 720x480, it still comes out off centre. What am I doing wrong? I want the resulting divx conversion to look like the original mpeg.