diff --git a/src/board/UBBoardController.cpp b/src/board/UBBoardController.cpp
index 145bbbbb..ee9bfe9e 100644
--- a/src/board/UBBoardController.cpp
+++ b/src/board/UBBoardController.cpp
@@ -1212,7 +1212,9 @@ void UBBoardController::ClearUndoStack()
         QGraphicsItem* item = itUniq.next();
         UBGraphicsScene *scene = (UBGraphicsScene*)item->scene();
         if(!scene)
-            delete item;
+        {
+            bool retCode = mActiveScene->deleteItem(item);
+        }
     }
 
 }
diff --git a/src/domain/UBGraphicsScene.cpp b/src/domain/UBGraphicsScene.cpp
index dd0790ad..6625095e 100644
--- a/src/domain/UBGraphicsScene.cpp
+++ b/src/domain/UBGraphicsScene.cpp
@@ -152,34 +152,28 @@ UBGraphicsScene::~UBGraphicsScene()
 
 void UBGraphicsScene::selectionChangedProcessing()
 {
-   if (selectedItems().count())
+    if (selectedItems().count())
         UBApplication::showMessage("ZValue is " + QString::number(selectedItems().first()->zValue(), 'f'));
 
 
     QList<QGraphicsItem *> allItemsList = items();
     qreal maxZ = 0.;
-    for( int i = 0; i < allItemsList.size(); i++ )
-    {
+    for( int i = 0; i < allItemsList.size(); i++ ) {
         QGraphicsItem *nextItem = allItemsList.at(i);
         //Temporary stub. Due to ugly z-order implementation I need to do this (sankore 360)
         //z-order behavior should be reimplemented and this stub should be deleted
         if (nextItem == mBackgroundObject)
             continue;
         //Temporary stub end (sankore 360)
-//        qreal zValue = nextItem->zValue();
         if (nextItem->zValue() > maxZ)
             maxZ = nextItem->zValue();
-
         nextItem->setZValue(nextItem->data(UBGraphicsItemData::ItemOwnZValue).toReal());
 //        nextItem->setZValue(qreal(1));
     }
     QList<QGraphicsItem *> selItemsList = selectedItems();
-//    QGraphicsItem *nextItem;
-    for( int i = 0; i < selItemsList.size(); i++ )
-    {
+    for( int i = 0; i < selItemsList.size(); i++ ) {
         QGraphicsItem *nextItem = selItemsList.at(i);
         nextItem->setZValue(maxZ + 0.0001);
-//        qDebug() << QString(" >>> %1 <<< ").arg(i) << QString(" >>> %1 <<< ").arg(zValue);
     }
 }
 
diff --git a/src/frameworks/UBCoreGraphicsScene.cpp b/src/frameworks/UBCoreGraphicsScene.cpp
index 4412f9b1..bcac6202 100644
--- a/src/frameworks/UBCoreGraphicsScene.cpp
+++ b/src/frameworks/UBCoreGraphicsScene.cpp
@@ -53,3 +53,16 @@ void UBCoreGraphicsScene::removeItem(QGraphicsItem* item, bool forceDelete)
         delete item;
     }
 }
+
+bool UBCoreGraphicsScene::deleteItem(QGraphicsItem* item)
+{
+    if(mItemsToDelete.contains(item))
+    {
+        mItemsToDelete.remove(item);
+        delete item;
+        return true;
+    }
+    else
+        return false;
+}
+
diff --git a/src/frameworks/UBCoreGraphicsScene.h b/src/frameworks/UBCoreGraphicsScene.h
index fdeaae49..656f2a00 100644
--- a/src/frameworks/UBCoreGraphicsScene.h
+++ b/src/frameworks/UBCoreGraphicsScene.h
@@ -28,6 +28,9 @@ class UBCoreGraphicsScene : public QGraphicsScene
 
         virtual void removeItem(QGraphicsItem* item, bool forceDelete = false);
 
+        virtual bool deleteItem(QGraphicsItem* item);
+
+
     private:
         QSet<QGraphicsItem*> mItemsToDelete;
 };
diff --git a/src/gui/UBTeacherBarWidget.cpp b/src/gui/UBTeacherBarWidget.cpp
index ea8348b1..c3986972 100644
--- a/src/gui/UBTeacherBarWidget.cpp
+++ b/src/gui/UBTeacherBarWidget.cpp
@@ -62,6 +62,7 @@ UBTeacherBarWidget::UBTeacherBarWidget(QWidget *parent, const char *name):UBDock
     mpTitleLabel->setAlignment(Qt::AlignRight);
     mpTitle = new QLineEdit(mpContainer);
     mpTitle->setObjectName("DockPaletteWidgetLineEdit");
+	connect(mpTitle, SIGNAL(textChanged(const QString&)), this, SLOT(onTitleTextChanged(const QString&)));
     mpTitleLayout = new QHBoxLayout();
     mpTitleLayout->addWidget(mpTitleLabel, 0);
     mpTitleLayout->addWidget(mpTitle, 1);
@@ -95,6 +96,7 @@ UBTeacherBarWidget::UBTeacherBarWidget(QWidget *parent, const char *name):UBDock
     mpEquipmentLabel->setAlignment(Qt::AlignRight);
     mpEquipment = new QLineEdit(mpContainer);
     mpEquipment->setObjectName("DockPaletteWidgetLineEdit");
+	connect(mpEquipment, SIGNAL(textChanged(const QString&)), this, SLOT(onEquipmentTextChanged(const QString&)));
     mpEquipmentLayout = new QHBoxLayout();
     mpEquipmentLayout->addWidget(mpEquipmentLabel, 0);
     mpEquipmentLayout->addWidget(mpEquipment, 1);
@@ -319,6 +321,16 @@ void UBTeacherBarWidget::loadContent()
     mpAction3->setStudentText(nextInfos.action3Student);
 }
 
+void UBTeacherBarWidget::onTitleTextChanged(const QString& text)
+{
+	mpTitle->setToolTip(text);
+}
+
+void UBTeacherBarWidget::onEquipmentTextChanged(const QString& text)
+{
+	mpEquipment->setToolTip(text);
+}
+
 UBTeacherStudentAction::UBTeacherStudentAction(int actionNumber, QWidget *parent, const char *name):QWidget(parent)
     , mpActionLabel(NULL)
     , mpTeacherLabel(NULL)
diff --git a/src/gui/UBTeacherBarWidget.h b/src/gui/UBTeacherBarWidget.h
index 555b6ef6..3f18bcbe 100644
--- a/src/gui/UBTeacherBarWidget.h
+++ b/src/gui/UBTeacherBarWidget.h
@@ -48,6 +48,8 @@ private slots:
     void saveContent();
     void loadContent();
     void onValueChanged();
+	void onTitleTextChanged(const QString& text);
+	void onEquipmentTextChanged(const QString& text);
 
 private:
     void populateCombos();