src/macosx/classes/sun/lwawt/LWWindowPeer.java

@@ -667,10 +667,12 @@
                 }
                 lastMouseEventPeer = null;
             }
         } else {
             if (targetPeer != lastMouseEventPeer) {
+                
+                if (id != MouseEvent.MOUSE_DRAGGED || lastMouseEventPeer == null) {
                 // lastMouseEventPeer may be null if mouse was out of Java windows
                 if (lastMouseEventPeer != null && lastMouseEventPeer.isEnabled()) {
                     // Sometimes, MOUSE_EXITED is not sent by delegate (or is sent a bit
                     // later), in which case lastWindowPeer is another window
                     if (lastWindowPeer != this) {

@@ -691,20 +693,21 @@
                                                  when, modifiers,
                                                  oldp.x, oldp.y, screenX, screenY,
                                                  clickCount, popupTrigger, button));
                     }
                 }
-                lastMouseEventPeer = targetPeer;
                 if (targetPeer != null && targetPeer.isEnabled() && id != MouseEvent.MOUSE_ENTERED) {
                     Point newp = targetPeer.windowToLocal(x, y, curWindowPeer);
                     postEvent(new MouseEvent(targetPeer.getTarget(),
                                              MouseEvent.MOUSE_ENTERED,
                                              when, modifiers,
                                              newp.x, newp.y, screenX, screenY,
                                              clickCount, popupTrigger, button));
                 }
             }
+                lastMouseEventPeer = targetPeer;
+            }
             // TODO: fill "bdata" member of AWTEvent
 
             int eventButtonMask = (button > 0)? MouseEvent.getMaskForButton(button) : 0;
             int otherButtonsPressed = modifiers & ~eventButtonMask;