I can pull the movie from the camera to computer, edit it using MovieMaker 2.0 and can save it to VCD, DVD etc with perfect quality.

However when I save as DV format and send it back to my camera (ie so that I can later copy it to a VCR tape for people without DVD Players), I get 3 second pauses/ glitches /hiccups in the finished tape (approx 1 every 15 minutes).
I'm using Windows XP. Firewire. Sony DV HandyCam.
I have tried a couple of different firewires. And tried many times. Camera has also been back to Sony for a look, and they say it's fine. (it records videos fine in the first place)

Does anyone know what may be causing this or has experienced it and fixed it.