--- old/src/macosx/classes/sun/lwawt/macosx/CPlatformEmbeddedFrame.java	2012-08-28 14:28:45.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CPlatformEmbeddedFrame.java	2012-08-28 14:28:45.000000000 +0400
@@ -151,6 +151,10 @@
     @Override
     public void setAlwaysOnTop(boolean value) {}
 
+    // This method should be properly implemented for applets.
+    // It returns null just as a stub.
+    public PlatformWindow getTopmostPlatformWindowUnderMouse() { return null; }
+
     @Override
     public void updateFocusableWindowState() {}