After two years of happily editing video on my G4 Powerbook, I dug deep and sprung for a 3 GHz Mac Pro for a larger project. It's been a nightmare. iMovie freezes when moving clips, forcing a quit -- and inexplicably dumps long-edited clips in the trash, forcing me to choose between unscrambling and reconstructing or losing work since the last (maniacal) save. iDVD snags on audio coding and won't burn at all. The resident genius was helpful but had no solutions. Others apps are slightly buggy (Aperture import was half-baked, iTunes crashed) and I wonder if I screwed this up by using the "migration assistant" in moving files over. Thoughts? Suggestions? Many thanks.