moving/dragging objects causes multiple copies along path

Running the X5 trial on W7-32b. Everything's been fine, until today. I think I inadvertently turned on a macro, don't know how to turn it off. When I simply drag an object on a page, multiple copies of the obj appear along the drag-path. The obj can be a shape, text block, paragraph text, etc. -- happens with anything I drag.

Does anybody know how to turn this feature off?

Thank you.