You are right.
I have tested again and have set the sequence postion view to 0:00:00.000 to see the exact position.
On the highest zoom level the navigation is 1/1000 sec that is more than fine. And the screen is not frozen, there are much steps to next frame and it works.
So this it very good.
The only wish for me for this topic is the possibility to have more or user defined navigation keys. I would like the follwing:
<-, -> step according zoom level (is now Strg+-> and Strg+<-)
Strg+->, Strg+<- move a second
PgUp, PgDn move for a 10 seconds
Alt+->, Alt+<- spring from clip to clip
Pos1, End spring to begin or end of a clip (not of whole film)
Many thanks for the help.
Thomas