So, I bought the JVC GZ-MC500 and it all works fine, exept when i import the video into iMovie HD, If i select it to DV widescreen or DV or MPEG-4 it works (but its not in HD) when i sellect one of the HD modes it dose not work, I can import the video and see it but it dose not play propely it plays for 1 second then gose back like a scratched DVD. what should i Do?