I would like to know if these editing issues are normal or not: 1) When I want to delete commercials, I first pause the movie, select the frame where the commercial starts and insert a chapter mark. However, the hidden piece does not start at the frame I chose, but 1 to 6 frames before it. Does this mean that editing points does not have "frame precision"? 2) When I play black the movie, it freezes a little at the edited points (??). Also, do +R and -R machines behave in the same way on these issues, or are there any differences? Kisses. Rebecca.