--- old/src/share/classes/javax/swing/PopupFactory.java	2012-06-06 14:52:06.406250000 +0400
+++ new/src/share/classes/javax/swing/PopupFactory.java	2012-06-06 14:52:05.487304700 +0400
@@ -203,12 +203,6 @@
                     popupType = HEAVY_WEIGHT_POPUP;
                     break;
                 }
-            } else if (c instanceof Window) {
-                Window w = (Window) c;
-                if (!w.isOpaque() || w.getOpacity() < 1 || w.getShape() != null) {
-                    popupType = HEAVY_WEIGHT_POPUP;
-                    break;
-                }
             }
             c = c.getParent();
         }
--- old/src/share/demo/jfc/TransparentRuler/transparentruler/Ruler.java	2012-06-06 14:52:12.688476600 +0400
+++ new/src/share/demo/jfc/TransparentRuler/transparentruler/Ruler.java	2012-06-06 14:52:11.706054700 +0400
@@ -134,6 +134,9 @@
 
     {
         jPopupMenu.add(new JMenuItem(exitAction));
+
+        // To avoid popup cutting by main window shape forbid light-weight popups
+        jPopupMenu.setLightWeightPopupEnabled(false);
     }
 
     /**
--- /dev/null	2012-06-06 14:52:18.000000000 +0400
+++ new/test/javax/swing/JPopupMenu/7156657/bug7156657.java	2012-06-06 14:52:16.856445300 +0400
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import com.sun.awt.AWTUtilities;
+import sun.awt.SunToolkit;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.util.concurrent.Callable;
+
+/* @test
+   @bug 7156657
+   @summary Version 7 doesn't support translucent popup menus against a translucent window
+   @library ../../regtesthelpers
+   @author Pavel Porvatov
+*/
+public class bug7156657 {
+    private static JFrame lowerFrame;
+
+    private static JFrame frame;
+
+    private static JPopupMenu popupMenu;
+
+    public static void main(String[] args) throws Exception {
+        final Robot robot = new Robot();
+        final SunToolkit toolkit = ((SunToolkit) Toolkit.getDefaultToolkit());
+
+        Boolean skipTest = Util.invokeOnEDT(new Callable<Boolean>() {
+            @Override
+            public Boolean call() throws Exception {
+                frame = createFrame();
+
+                if (!AWTUtilities.isTranslucencyCapable(frame.getGraphicsConfiguration())) {
+                    System.out.println("Translucency is not supported, the test skipped");
+
+                    return true;
+                }
+
+                lowerFrame = createFrame();
+                lowerFrame.getContentPane().setBackground(Color.RED);
+                lowerFrame.setVisible(true);
+
+                popupMenu = new JPopupMenu();
+                popupMenu.setOpaque(false);
+                popupMenu.add(new TransparentMenuItem("1111"));
+                popupMenu.add(new TransparentMenuItem("2222"));
+                popupMenu.add(new TransparentMenuItem("3333"));
+
+                AWTUtilities.setWindowOpaque(frame, false);
+                JPanel pnContent = new JPanel();
+                pnContent.setBackground(new Color(255, 255, 255, 128));
+                frame.add(pnContent);
+                frame.setVisible(true);
+
+                return false;
+            }
+        });
+
+        if (skipTest) {
+            return;
+        }
+
+        toolkit.realSync();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                popupMenu.show(frame, 0, 0);
+            }
+        });
+
+        toolkit.realSync();
+
+        Rectangle popupRectangle = Util.invokeOnEDT(new Callable<Rectangle>() {
+            @Override
+            public Rectangle call() throws Exception {
+                return popupMenu.getBounds();
+            }
+        });
+
+        BufferedImage redBackgroundCapture = robot.createScreenCapture(popupRectangle);
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                lowerFrame.getContentPane().setBackground(Color.GREEN);
+            }
+        });
+
+        toolkit.realSync();
+
+        BufferedImage greenBackgroundCapture = robot.createScreenCapture(popupRectangle);
+
+        if (Util.compareBufferedImages(redBackgroundCapture, greenBackgroundCapture)) {
+            throw new RuntimeException("The test failed");
+        }
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                popupMenu.setVisible(false);
+                frame.dispose();
+                lowerFrame.dispose();
+            }
+        });
+
+        System.out.println("The test passed");
+    }
+
+
+    private static JFrame createFrame() {
+        JFrame result = new JFrame();
+
+        result.setLocation(0, 0);
+        result.setSize(400, 300);
+        result.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        result.setUndecorated(true);
+
+        return result;
+    }
+
+    private static class TransparentMenuItem extends JMenuItem {
+        public TransparentMenuItem(String text) {
+            super(text);
+            setOpaque(false);
+        }
+
+        @Override
+        public void paint(Graphics g) {
+            Graphics2D g2 = (Graphics2D) g.create();
+            g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f));
+            super.paint(g2);
+            g2.dispose();
+        }
+    }
+}