Hi
"They occur however carefully I do the cutting."
Just a little additional info.
The shortest clip you can make (or get) on the timeline by using the split option is 0.025 seconds duration which is 1 frame on the timeline which may be difficult to see.
In Storyboard mode this will expand to one thumbnail so it can be easily deleted.
If you are editing to such fine limits and want to avoid these bits it might be better to edit the clip in the Clip preview window......
Click the clip to edit and switch to Clip preview .
Move the preview screen red cursor line to the exact edit point (use frame by frame movement if necessary) and then click the IN marker START button. This will "cut" the clip exactly where you want it to start from.(The cut off section will go dark)
Move the cursor along to the end edit point..using frame by frame adjustment if necessary and then click the OUT marker END button.
This will isolate exactly the section you want to keep. To see it more clearly you can "undock" the preview window by clicking the top right hand corner
(Suggestions have been made to NCH to put the the IN/OUT markers at the top edge of the thumbnail track so they are more easily visible and don't obscure the cursor line handle.)
If the clip is already on the timeline it will be automatically trimmed and any gaps deleted. If not, and you are editing the clip from the media list bin then clicking the down arrow next to the Place button under the Clip preview screen will put the edited clip at a position of your choice.
Using this approach should avoid you getting bits of clips left on the timeline.
Nat