In ImageEnMView component, the selection (OnImageSelect Event) is fired on mouse up. This comportement is strange when you drag and drop images to move them in file because the moved image is the selected, not the one you've just clicked on when starting dragging.
How can we do to drag the good image (multiselection is enabled)
V4.3.2 has a new option to optimize selection for dragging, which should resolve the issue. You can email me for the source, though an official beta should be ready in the next week or so.