I have recently had a great issue with jerky AVI files. I have had VF for about 2 months and, in learning, used AVI files as sources and produced an .AVI of just fine quality. But recently, my source AVIs (which I don't use too often) and the .AVI I recently produced copme out very jerky-- the edges of whatever is in motion in the video are distorted by horizontal lines. Very Odd-- anyone else experience this?