src/java.desktop/macosx/classes/com/apple/laf/AquaLookAndFeel.java

@@ -272,11 +272,11 @@
         final InsetsUIResource menuItemMargin = zeroInsets;
 
         // <rdar://problem/5189013> Entire Java application window refreshes when moving off Shortcut menu item
         final Boolean useOpaqueComponents = Boolean.TRUE;
 
-        final Boolean buttonShouldBeOpaque = AquaUtils.shouldUseOpaqueButtons() ? Boolean.TRUE : Boolean.FALSE;
+        final Boolean buttonShouldBeOpaque = Boolean.FALSE;
 
         // *** List value objects
         final Object listCellRendererActiveValue = new UIDefaults.ActiveValue(){
             public Object createValue(UIDefaults defaultsTable) {
                 return new DefaultListCellRenderer.UIResource();