diff -r 627c4a0fd0e7 -r c3690ec91ef8 src/hbwidgets/itemviews/hbtreemodeliterator_p.cpp
--- a/src/hbwidgets/itemviews/hbtreemodeliterator_p.cpp	Fri Jun 11 13:58:22 2010 +0300
+++ b/src/hbwidgets/itemviews/hbtreemodeliterator_p.cpp	Wed Jun 23 18:33:25 2010 +0300
@@ -97,7 +97,7 @@
     \reimp
     Returnes index of item, which is visible at pos ordinal under parent. 
     Indexes in collapsed parents are not taken into account.
-    Very slow - need to interate throught whole model in worst case!
+    Very slow - need to interate through whole model in worst case!
 */
 QModelIndex HbTreeModelIterator::index(int pos, const QModelIndex &parent) const
 {
@@ -295,6 +295,8 @@
                     this, SLOT(columnsInserted(QModelIndex,int,int)));
             connect(d->mModel, SIGNAL(columnsRemoved(QModelIndex,int,int)),
                     this, SLOT(columnsRemoved(QModelIndex,int,int)));
+            connect(d->mModel, SIGNAL(layoutChanged()),
+                    this, SLOT(modelLayoutChanged()));
         }
     } else {
         setRootIndex(rootIndex);
@@ -393,5 +395,11 @@
     d->resetCache();
 }
 
+void HbTreeModelIterator::modelLayoutChanged()
+{
+    Q_D(HbTreeModelIterator);
+    d->resetCache();
+}
+
 #include "moc_hbtreemodeliterator_p.cpp"