Hi Thorsten,
I noticed today, that the cursor is moving if I scroll through a file.
This is nothing new to the version you are running as this behaviour has been in Zeus right from the beginning.
I cannot find any editor option to change this behaviour. Is this a bug or a feature?

I call it a feature, but others might call it a bug
Some history. Having been brought up using Brief on OS/2, I'm very much a keyboard user.
After moving to Windows I found two things. Brief ran poorly and I found this new scroll feature that would always catch me out.
I would scroll page after page using the mouse, only to then lose that page, because I would always forget to click the mouse before hitting a keyboard key.
So when I decided to write a Brief clone for Windows (called Zeus) I made sure it would stop me making that mistake again ever again.
That is the behaviour you are seeing.
If I scroll now towards the top, the cursor scrolls with the viewport and, thus, the cursor's position gets changed continuously.
Yes, Zeus will always keep the cursor somewhere on the screen.
Cheers Jussi