i recently edited some dv footage and returned the footage to the tape in the camera. when i reviewed the footage, there were some jagged spaces --small ones -two or three-that showed up. they were not along my edit lines. are these "lost frames"-is this caused by me or my computer?

i brought the footage directly in, edited it, sent it back. the spots were in my saved .avi as well as on the tape.
i have 256 k ram and a very fast computer-no other pgms running-etc.
need some imput

thanks mikegee