--- old/src/macosx/classes/sun/lwawt/macosx/CPlatformEmbeddedFrame.java	2012-08-24 17:11:23.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CPlatformEmbeddedFrame.java	2012-08-24 17:11:23.000000000 +0400
@@ -151,6 +151,8 @@
     @Override
     public void setAlwaysOnTop(boolean value) {}
 
+    public PlatformWindow getTopmostPlatformWindowUnderMouse() { return null; }
+
     @Override
     public void updateFocusableWindowState() {}