A GLWindow is created and a mouse listener registered. The listener receives public void mouseMoved(MouseEvent e)
If the window is maximized (pressing the green "plus" button on the window decoration) the move events aren't received. Draggable events are sent if you keep the mouse button pressed.
Un-maximizing and the resizing the window the move events are again sent.

Using JogAmp 2.1.4, JDK 1.8.0-ea-b121, OSX 10.9.
This seems a regression, it did not happen in 2.1.4-rc-20131224

The following test class can be used to illustrate the problem.

import com.jogamp.newt.event.MouseAdapter;
import com.jogamp.newt.event.MouseEvent;
import com.jogamp.newt.opengl.GLWindow;
import com.jogamp.opengl.util.Animator;
import java.io.IOException;
import javax.media.nativewindow.WindowClosingProtocol;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLException;
import javax.media.opengl.GLProfile;

public class MouseListenerBug {

	public static void main(String... args) {
		MouseListenerBug app = new MouseListenerBug();
		app.run();
	}

	private void run() {
		final GLCapabilities caps = new GLCapabilities(GLProfile.get(GLProfile.GL4));
		caps.setBackgroundOpaque(true);
		caps.setDoubleBuffered(true);
		caps.setDepthBits(8);
		GLWindow glWindow = GLWindow.create(caps);
		glWindow.setTitle("Corridors");
		glWindow.setSize(1024, 768);
		glWindow.setUndecorated(false);
		glWindow.setPointerVisible(true);
		glWindow.setVisible(true);
		glWindow.setFullscreen(false);
		glWindow.setDefaultCloseOperation(WindowClosingProtocol.WindowClosingMode.DISPOSE_ON_CLOSE);

		glWindow.addGLEventListener(new GLEventListener() {
			@Override
			public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
				System.out.println("Reshape <" + width + "," + height + ">");
			}

			@Override
			public void init(GLAutoDrawable drawable) {
			}

			@Override
			public void dispose(GLAutoDrawable drawable) {
			}

			@Override
			public void display(GLAutoDrawable drawable) {
			}
		});

		glWindow.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseMoved(MouseEvent e) {
				short x = (short) e.getX();
				short y = (short) e.getY();
				System.out.println("Mouse moved <" + x + "," + y + ">");
			}

			@Override
			public void mouseDragged(MouseEvent e) {
				short x = (short) e.getX();
				short y = (short) e.getY();
				System.out.println("Mouse dragged <" + x + "," + y + ">");
			}

			@Override
			public void mousePressed(MouseEvent e) {

				if (!e.isAutoRepeat()) {
					System.out.println("Mouse button pressed" + e);
				}
			}

			@Override
			public void mouseReleased(MouseEvent e) {

				if (!e.isAutoRepeat()) {
					System.out.println("Mouse button pressed" + e);
				}

			}
		});

		Animator animator = new Animator(glWindow);
		animator.start();

	}
}