Ticket #3477: 3477_2.patch

_source/core/dom/walker.js

@@ -263 +263 @@
                          */
                         checkForward : function()
                         {
-                                return iterate.call( this, false, true ) !== false;
+                                var result;
+                                while( ( result = iterate.call( this, false, true ) ) !== null )
+                                        if ( result === false )
+                                                return false;
+                                return true;
                         },
 
                         /**
@@ -273 +277 @@
                          */
                         checkBackward : function()
                         {
-                                return iterate.call( this, true, true ) !== false;
+                                var result;
+                                while( ( result = iterate.call( this, true, true ) ) !== null )
+                                        if ( result === false )
+                                                return false;
+                                return true;
                         }
 
 // The following features have been originally included in the implementation,