Thanks for replying, HandySolo. There’s nothing in the web servers error log to explain the behavior of WP in this case.
In fact I’ve made a set up earlier today at a different domain with the exact same result.
I have browsed through many of the “Blank screen”-strings in the support forum, but none of the proposed solutions seem to make my problems go away.
Therefore, if there is any suggestion you may give in this respect I would be very glad.