>Our builder adjust grids (except for the one that actually need to scroll horizontally) to leave just one pixel column at the rightmost position. As you say, this is not nice, because a double border remains there. But one pixel is the tiniest space to avoid this effect. I'll enter this one on the Wish List.

This has been the case since several versions. For me, also, one pixel was doing it. But, in VFP 8, sometimes, it takes up to 3 pixels.