diff -ur qt-everywhere-opensource-src-4.6.3/src/3rdparty/webkit/WebCore/rendering/RenderLayer.cpp qt-everywhere-opensource-src-4.6.3-2010-1412/src/3rdparty/webkit/WebCore/rendering/RenderLayer.cpp

--- qt-everywhere-opensource-src-4.6.3/src/3rdparty/webkit/WebCore/rendering/RenderLayer.cpp	2010-06-02 04:03:11.000000000 +0200

+++ qt-everywhere-opensource-src-4.6.3-2010-1412/src/3rdparty/webkit/WebCore/rendering/RenderLayer.cpp	2010-06-11 00:09:43.741191104 +0200

@@ -3039,22 +3039,33 @@

     // Locate the common ancestor render object for the two renderers.

     RenderObject* ancestor = commonAncestor(oldHoverObj, newHoverObj);

+    Vector<Node*, 32> nodesToRemoveFromChain;

+    Vector<Node*, 32> nodesToAddToChain;

+

     if (oldHoverObj != newHoverObj) {

         // The old hover path only needs to be cleared up to (and not including) the common ancestor;

         for (RenderObject* curr = oldHoverObj; curr && curr != ancestor; curr = curr->hoverAncestor()) {

-            if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain())) {

-                curr->node()->setActive(false);

-                curr->node()->setHovered(false);

-            }

+            if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain()))

+                nodesToRemoveFromChain.append(curr->node());

         }

     }

     // Now set the hover state for our new object up to the root.

     for (RenderObject* curr = newHoverObj; curr; curr = curr->hoverAncestor()) {

-        if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain())) {

-            curr->node()->setActive(request.active());

-            curr->node()->setHovered(true);

-        }

+        if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain()))

+            nodesToAddToChain.append(curr->node());

+    }

+

+    size_t removeCount = nodesToRemoveFromChain.size();

+    for (size_t i = 0; i < removeCount; ++i) {

+        nodesToRemoveFromChain[i]->setActive(false);

+        nodesToRemoveFromChain[i]->setHovered(false);

+    }

+

+    size_t addCount = nodesToAddToChain.size();

+    for (size_t i = 0; i < addCount; ++i) {

+        nodesToAddToChain[i]->setActive(request.active());

+        nodesToAddToChain[i]->setHovered(true);

     }

 }