please excuse my ignorance. i'm starting to use blender 2.72 for its Video Editor. i'm slowly making progress, but ran into a problem when i tried to re-import a rendered movie. blender seems to think it has no dimensions...could that be the problem? to be clear - i rendered an animation (movie)as avi, from a Blender Session, and then imported it again, into the same session, as a fresh source file for further processing. but the sequencer doesn't read it.... i tried various rendering output options, but none seem to correct this.