I'm using an IMac and running Mac OSX and when I add subtitles or transitions using IMovie to my video and record to tape, it seems that at each scene where the edit was made, there's copy protection. I tried to record from the tape to my standalone Philips DVDR75 and records okay up until I reach the section where I edited the video and then a copy protect message shows up. Is there a feature I have turned on in IMovie that could cause that to happen and how can I disable it?