I am compressing a trailer for my new short film to work on an ipod. Using the ipod preset in Compressor, with a few tweaks, teh video quality is great. The only problem is that the video is letterboxed to 2.35; this shows up letterboxed on the ipod as it should, but there is a thin white line along the top of the bottom black letterbox. I have the size set at 320x176 (this is the size of other trailers from the apple site that are 2.35); I have tried other sizes, but the quality of the video suffers. Any ideas why that white line is showing up?