Hi there :)
I have been working on a Course Pres with 1 drag and drop on each slide (x16 slides). File attached.
Today the draggable items are moving after saves (they move about 20px in random ways). Sometimes they hide under the drop and drag canvas and I can't get them out in edit mode:(
I created this resource in Firefox - when viewed in FF, Chrome and IE the random draggables appear to have moved after each time I save it.