In the meantime I found the "wrongdoer":

The build process I run inside the IDE itself performs a SVN access (checkout of some files). For that, I used a different SVN account and have overlooked the option box "don't cache authentication information locally (--no-auth-cache)".
After enabling this ...

Thanks for the respond.

The IDE I'm using is called "Final Builder". It's a tool for writing build automation processes.
The user name is not configurable via the IDE; it's only selectable which Source Control Provider should be used.

I have a sneaking suspicion, that there is some other process ...

Hi,

During my tests with Agent SVN I used a dummy user to access the SVN repository (via http).
Now I like to switch to the "right" user (with my own credentials), but I didn't find a way to do that.

So, how to change the user name (and password) which Agent SVN uses to access the repository ...