I had this sort of problem w/ a jvc-hd110u until i started using cineform’s aspect HD capture utility HDlink. i had dropouts and sync issues with premiere pro capture from the camera, and other software options. i also had no problems recording direct to a laptop w/ onLocation. the workflow with this codec is pernicious, to say the least. it’s worthwhile to go w/ the cineform option throughout you edits, to tiff seq for greenscreen and FX work, and stay out of the hdv deal altogether.