A DESCRIPTION OF THE REGRESSION :
Create component. Add MouseMotionListener and DragGestureListener to it.
Drag mouse across the component.

REPRODUCIBLE TESTCASE OR STEPS TO REPRODUCE:
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class TestApp {
	private final JFrame frame = new JFrame();
	private final JPanel panel = new JPanel();

	public static void main(String[] args) {
		new TestApp().start();
	}

	public void start() {
		frame.getContentPane().add(panel);
		panel.setSize(100, 100);
		panel.addMouseMotionListener(new MyMouseListener());
		frame.addWindowListener(new WindowListener() {
			public void windowActivated(WindowEvent e) {}
			public void windowClosed(WindowEvent e) {}
			public void windowClosing(WindowEvent e) {
				frame.dispose();
				System.exit(0);
			}
			public void windowDeactivated(WindowEvent e) {}
			public void windowDeiconified(WindowEvent e) {}
			public void windowIconified(WindowEvent e) {}
			public void windowOpened(WindowEvent e) {}
		});
		frame.show();
	}

	private class MyMouseListener implements MouseMotionListener {
		public MyMouseListener() {
			final DragSource dragSource = DragSource.getDefaultDragSource();
			DragGestureListener gesture = new DragGestureListener() {
				public void dragGestureRecognized(DragGestureEvent dge) {
					System.out.println("dragGestureRecognized");
				}
			};
			dragSource.createDefaultDragGestureRecognizer(panel,
					DnDConstants.ACTION_COPY_OR_MOVE, gesture);

		}
		public void mouseDragged(MouseEvent e) {
			System.out.println("mouseDragged");
		}
		public void mouseMoved(MouseEvent e) {}
	}
}


RELEASE LAST WORKED:
5.0

RELEASE TEST FAILS:
mustang-b72

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
MouseDragged is the first fired event. DragGestureRecognized is fired later.
ACTUAL -
DragGestureRecognized is the first fired event, MouseDragged is the second one.