Up till upgrading my iMovie from 4 to 5.01, I've successfully captured video into my Mac using my ADVC100 box. Now it doersn't find it. I've done all the normal tricks...powered up my G5 with analog signal running through the the ADVC100...powered on & off s everal times with iMovie open to establish contact by no joy. It It knows it's there & identifies it as a camera, but it won't receive picture or audio. Any ideas?