So i managed to build the Demo on Linux (Ubuntu 12.04 with MATE desktop) and the drag and drop demo tab is not working when dragging rows from the demo table to the target. It catches external drag and drop events, but the internal ones are not working (i get the same behavior in my app but i wanted to verify that). All the virtual events for the DragAndDropTarget object are silent although all the mouse events are getting triggered.
It looks like sometimes it works though, i noticed that if I right click on the target component first and then do a drag&drop event it works, but only once after the click.
Also when i DROP the actual item, the main demo window looses it's focus for a brief moment (weird?)