diff -r 2e0f3af1f34b javafx-ui-common/src/javafx/scene/Node.java
--- a/javafx-ui-common/src/javafx/scene/Node.java	Mon Jul 23 13:11:42 2012 +1200
+++ b/javafx-ui-common/src/javafx/scene/Node.java	Mon Jul 23 14:17:56 2012 -0700
@@ -7332,8 +7332,9 @@
      */
     @Deprecated // SB-dependency: RT-21206 has been filed to track this
     public void impl_processCSS(boolean reapply) {
-
-        StyleHelper styleHelper = null;
+        if (!reapply && cssFlag == CSSFlags.CLEAN) return;
+
+        StyleHelper styleHelper;
         // Create a new StyleHelper either if I am told I need to reapply
         // or if my own flag indicates I need to reapply
         if (reapply || (cssFlag == CSSFlags.REAPPLY)) {
diff -r 2e0f3af1f34b javafx-ui-common/src/javafx/scene/Parent.java
--- a/javafx-ui-common/src/javafx/scene/Parent.java	Mon Jul 23 13:11:42 2012 +1200
+++ b/javafx-ui-common/src/javafx/scene/Parent.java	Mon Jul 23 14:17:56 2012 -0700
@@ -1142,6 +1142,8 @@
      */
     @Deprecated
     @Override public void impl_processCSS(boolean reapply) {
+        if (!reapply && cssFlag == CSSFlags.CLEAN) return;
+
         // Determine whether we will need to reapply from here on down
         boolean flag = reapply || cssFlag == CSSFlags.REAPPLY;
         // Let the super implementation handle CSS for this node
diff -r 2e0f3af1f34b javafx-ui-controls/src/com/sun/javafx/scene/control/skin/VirtualFlow.java
--- a/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/VirtualFlow.java	Mon Jul 23 13:11:42 2012 +1200
+++ b/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/VirtualFlow.java	Mon Jul 23 14:17:56 2012 -0700
@@ -839,15 +839,13 @@
         // we may not perform a layout here, meaning that the cell will likely
         // 'jump' (in height normally) when the user drags the virtual thumb as
         // that is the first time the layout would occur otherwise.
-        Cell cell;
         boolean cellNeedsLayout = false;
-        for (int i = 0; i < cells.size(); i++) {
-            cell = cells.get(i);
+        for (int i=0, max=cells.size(); i<max; i++) {
+            final Cell cell = cells.get(i);
             cellNeedsLayout = cell.isNeedsLayout();
             if (cellNeedsLayout) break;
         }
-        cell = null;
-        
+
         IndexedCell firstCell = getFirstVisibleCell();
 
         // If no cells need layout, we check other criteria to see if this 
@@ -1240,15 +1238,19 @@
     }
 
     @Override protected void setWidth(double value) {
-        super.setWidth(value);
-        setNeedsLayout(true);
-        requestLayout();
+        if (getWidth() != value) {
+            super.setWidth(value);
+            setNeedsLayout(true);
+            requestLayout();
+        }
     }
     
     @Override protected void setHeight(double value) {
-        super.setHeight(value);
-        setNeedsLayout(true);
-        requestLayout();
+        if (getHeight() != value) {
+            super.setHeight(value);
+            setNeedsLayout(true);
+            requestLayout();
+        }
     }
 
     private void updateScrollBarsAndViewport(double lastViewportLength) {
@@ -1481,8 +1483,8 @@
         }
 
         // check the pile
-        for (int i = 0; i < pile.size(); i++) {
-            IndexedCell cell = pile.get(i);
+        for (int i=0, max=pile.size(); i<max; i++) {
+            final IndexedCell cell = pile.get(i);
             if (cell != null && cell.getIndex() == index) {
                 // Note that we don't remove from the pile: if we do it leads
                 // to a severe performance decrease. This seems to be OK, as
@@ -1493,8 +1495,9 @@
         }
 
         // We need to use the accumCell and return that
-        if (accumCell == null && getCreateCell() != null) {
-            accumCell = getCreateCell().call(this);
+        final Callback<VirtualFlow, ? extends IndexedCell> factory = getCreateCell();
+        if (accumCell == null && factory != null) {
+            accumCell = factory.call(this);
             accumCellParent.getChildren().add(accumCell);
         }
         setCellIndex(accumCell, index);
@@ -1615,11 +1618,12 @@
         
         // Fix for RT-12822. We try to retrieve the cell from the pile rather
         // than just grab a random cell from the pile (or create another cell).
-        for (int i = 0; i < pile.size(); i++) {
-            IndexedCell _cell = pile.get(i);
+        for (int i=0, max=pile.size(); i<max; i++) {
+            final IndexedCell _cell = pile.get(i);
             if (_cell != null && _cell.getIndex() == prefIndex) {
                 pile.remove(i);
                 cell = _cell;
+                break;
             }
         }
 
diff -r 2e0f3af1f34b javafx-ui-controls/src/javafx/scene/control/Cell.java
--- a/javafx-ui-controls/src/javafx/scene/control/Cell.java	Mon Jul 23 13:11:42 2012 +1200
+++ b/javafx-ui-controls/src/javafx/scene/control/Cell.java	Mon Jul 23 14:17:56 2012 -0700
@@ -341,9 +341,14 @@
 
     // --- empty
     private ReadOnlyBooleanWrapper empty = new ReadOnlyBooleanWrapper(true) {
+        private boolean oldEmpty = true;
         @Override protected void invalidated() {
-            impl_pseudoClassStateChanged(PSEUDO_CLASS_EMPTY);
-            impl_pseudoClassStateChanged(PSEUDO_CLASS_FILLED);
+            boolean _empty = get();
+            if (oldEmpty != _empty) {
+                impl_pseudoClassStateChanged(PSEUDO_CLASS_EMPTY);
+                impl_pseudoClassStateChanged(PSEUDO_CLASS_FILLED);
+                oldEmpty = _empty;
+            }
         }
 
         @Override
diff -r 2e0f3af1f34b javafx-ui-controls/src/javafx/scene/control/IndexedCell.java
--- a/javafx-ui-controls/src/javafx/scene/control/IndexedCell.java	Mon Jul 23 13:11:42 2012 +1200
+++ b/javafx-ui-controls/src/javafx/scene/control/IndexedCell.java	Mon Jul 23 14:17:56 2012 -0700
@@ -73,9 +73,14 @@
     
     // --- Index
     private ReadOnlyIntegerWrapper index = new ReadOnlyIntegerWrapper(this, "index", -1) {
+        private boolean oldEven = true;
         @Override protected void invalidated() {
-            impl_pseudoClassStateChanged(PSEUDO_CLASS_EVEN);
-            impl_pseudoClassStateChanged(PSEUDO_CLASS_ODD);
+            final boolean _even = get() % 2 == 0;
+            if (oldEven != _even) {
+                impl_pseudoClassStateChanged(PSEUDO_CLASS_EVEN);
+                impl_pseudoClassStateChanged(PSEUDO_CLASS_ODD);
+                oldEven = _even;
+            }
         }
     };
 
@@ -108,9 +113,11 @@
      *         by those implementing new Skins. It is not common
      *         for developers or designers to access this function directly.
      */
-    public void updateIndex(int i) { 
-        index.set(i);
-        indexChanged();
+    public void updateIndex(int i) {
+        if (getIndex() != i) {
+            index.set(i);
+            indexChanged();
+        }
     }
     
     void indexChanged() {