diff --git a/AdvancedDockingSystem/include/ads/API.h b/AdvancedDockingSystem/include/ads/API.h
index 9714863..6c721db 100644
--- a/AdvancedDockingSystem/include/ads/API.h
+++ b/AdvancedDockingSystem/include/ads/API.h
@@ -1,10 +1,8 @@
 #ifndef ADS_API_H
 #define ADS_API_H
 
-#include <QByteArray>
-#include <QDataStream>
-#include <QIODevice>
-#include <QSharedPointer>
+#include <QFlags>
+class QWidget;
 class QSplitter;
 
 // DLL Export API
@@ -38,6 +36,8 @@ class QSplitter;
 //#define ADS_ANIMATION_DURATION 150
 
 ADS_NAMESPACE_BEGIN
+class ContainerWidget;
+class SectionWidget;
 
 enum DropArea
 {
@@ -52,11 +52,11 @@ enum DropArea
 };
 Q_DECLARE_FLAGS(DropAreas, DropArea)
 
-void deleteEmptySplitter(class ContainerWidget* container);
-class ContainerWidget* findParentContainerWidget(class QWidget* w);
-class SectionWidget* findParentSectionWidget(class QWidget* w);
-QSplitter* findParentSplitter(class QWidget* w);
-QSplitter* findImmediateSplitter(class QWidget* w);
+void deleteEmptySplitter(ContainerWidget* container);
+ContainerWidget* findParentContainerWidget(QWidget* w);
+SectionWidget* findParentSectionWidget(QWidget* w);
+QSplitter* findParentSplitter(QWidget* w);
+QSplitter* findImmediateSplitter(QWidget* w);
 
 ADS_NAMESPACE_END
 #endif
diff --git a/AdvancedDockingSystem/include/ads/ContainerWidget.h b/AdvancedDockingSystem/include/ads/ContainerWidget.h
index 36261f8..f596f32 100644
--- a/AdvancedDockingSystem/include/ads/ContainerWidget.h
+++ b/AdvancedDockingSystem/include/ads/ContainerWidget.h
@@ -1,21 +1,21 @@
 #ifndef ADS_CONTAINERWIDGET_H
 #define ADS_CONTAINERWIDGET_H
 
+#include <QList>
 #include <QPointer>
 #include <QFrame>
-#include <QGridLayout>
-#include <QPoint>
-#include <QList>
+class QPoint;
 class QSplitter;
 class QMenu;
+class QGridLayout;
 
 #include "ads/API.h"
 #include "ads/Internal.h"
 #include "ads/SectionContent.h"
-#include "ads/SectionWidget.h"
 #include "ads/FloatingWidget.h"
 
 ADS_NAMESPACE_BEGIN
+class SectionWidget;
 class InternalContentData;
 
 
@@ -28,6 +28,7 @@ class ADS_EXPORT_API ContainerWidget : public QFrame
 	Q_OBJECT
 	Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation NOTIFY orientationChanged)
 
+	friend class SectionContent;
 	friend class SectionWidget;
 	friend class FloatingWidget;
 	friend class SectionTitleWidget;
@@ -35,6 +36,7 @@ class ADS_EXPORT_API ContainerWidget : public QFrame
 
 public:
 	explicit ContainerWidget(QWidget *parent = NULL);
+	virtual ~ContainerWidget();
 
 	//
 	// Public API
@@ -132,12 +134,20 @@ signals:
 	void activeTabChanged(const SectionContent::RefPtr& sc, bool active);
 
 private:
+	// Elements inside container.
 	QList<SectionWidget*> _sections;
 	QList<FloatingWidget*> _floatings;
-
 	QHash<int, HiddenSectionItem> _hiddenSectionContents;
 
 
+	// Helper lookup maps, restricted to this container.
+	QHash<int, SectionContent::WeakPtr> _scLookupMapById;
+	QHash<QString, SectionContent::WeakPtr> _scLookupMapByName;
+
+	QHash<int, SectionWidget*> _swLookupMapById;
+	//QHash<ContainerWidget*, QHash<int, SectionWidget*> > _swLookupMapByContainer; // TODO Do we really need it?
+
+
 	// Layout stuff
 	QGridLayout* _mainLayout;
 	Qt::Orientation _orientation;
diff --git a/AdvancedDockingSystem/include/ads/DropOverlay.h b/AdvancedDockingSystem/include/ads/DropOverlay.h
index 2a1fea5..a89d096 100644
--- a/AdvancedDockingSystem/include/ads/DropOverlay.h
+++ b/AdvancedDockingSystem/include/ads/DropOverlay.h
@@ -1,12 +1,13 @@
 #ifndef DROP_OVERLAY_H
 #define DROP_OVERLAY_H
 
-#include <QFrame>
 #include <QRect>
+#include <QFrame>
 
 #include "ads/API.h"
 
 ADS_NAMESPACE_BEGIN
+class DropSplitAreas;
 
 // DropOverlay paints a translucent rectangle over another widget.
 // It can also show different types of drop area indicators.
@@ -26,7 +27,7 @@ protected:
 	virtual void moveEvent(QMoveEvent* e);
 
 private:
-	class DropSplitAreas* _splitAreas;
+	DropSplitAreas* _splitAreas;
 	bool _fullAreaDrop;
 };
 
diff --git a/AdvancedDockingSystem/include/ads/FloatingWidget.h b/AdvancedDockingSystem/include/ads/FloatingWidget.h
index 0438f22..7dce5c0 100644
--- a/AdvancedDockingSystem/include/ads/FloatingWidget.h
+++ b/AdvancedDockingSystem/include/ads/FloatingWidget.h
@@ -2,7 +2,6 @@
 #define FLOATINGWIDGET_H
 
 #include <QWidget>
-#include <QFrame>
 class QBoxLayout;
 
 #include "ads/API.h"
diff --git a/AdvancedDockingSystem/include/ads/Internal.h b/AdvancedDockingSystem/include/ads/Internal.h
index 062b833..ccd996a 100644
--- a/AdvancedDockingSystem/include/ads/Internal.h
+++ b/AdvancedDockingSystem/include/ads/Internal.h
@@ -5,7 +5,10 @@
 #include <QWeakPointer>
 
 #include "ads/API.h"
-#include "ads/SectionContent.h"
+
+#define SCLookupMapById(X)   X->_scLookupMapById
+#define SCLookupMapByName(X) X->_scLookupMapByName
+#define SWLookupMapById(X)   X->_swLookupMapById
 
 ADS_NAMESPACE_BEGIN
 class SectionContent;
@@ -22,7 +25,7 @@ public:
 	InternalContentData();
 	~InternalContentData();
 
-	SectionContent::RefPtr content;
+	QSharedPointer<SectionContent> content;
 	SectionTitleWidget* titleWidget;
 	SectionContentWidget* contentWidget;
 };
diff --git a/AdvancedDockingSystem/include/ads/SectionContent.h b/AdvancedDockingSystem/include/ads/SectionContent.h
index d5d8a75..f101f71 100644
--- a/AdvancedDockingSystem/include/ads/SectionContent.h
+++ b/AdvancedDockingSystem/include/ads/SectionContent.h
@@ -1,11 +1,10 @@
 #ifndef SECTIONCONTENT_H
 #define SECTIONCONTENT_H
 
-#include <QPointer>
-#include <QWidget>
-#include <QHash>
 #include <QSharedPointer>
 #include <QWeakPointer>
+#include <QPointer>
+class QWidget;
 
 #include "ads/API.h"
 
@@ -51,7 +50,7 @@ private:
 	const int _uid;
 	QString _uniqueName;
 
-	ContainerWidget* _containerWidget;
+	QPointer<ContainerWidget> _containerWidget;
 	QPointer<QWidget> _titleWidget;
 	QPointer<QWidget> _contentWidget;
 
@@ -59,8 +58,6 @@ private:
 	QString _title;
 
 	static int GetNextUid();
-	static QHash<int, SectionContent::WeakPtr>& GetLookupMap();
-	static QHash<QString, SectionContent::WeakPtr>& GetLookupMapByName();
 };
 
 ADS_NAMESPACE_END
diff --git a/AdvancedDockingSystem/include/ads/SectionTitleWidget.h b/AdvancedDockingSystem/include/ads/SectionTitleWidget.h
index faa7ce5..31d98f8 100644
--- a/AdvancedDockingSystem/include/ads/SectionTitleWidget.h
+++ b/AdvancedDockingSystem/include/ads/SectionTitleWidget.h
@@ -1,8 +1,9 @@
 #ifndef SECTION_TITLE_WIDGET_H
 #define SECTION_TITLE_WIDGET_H
 
-#include <QFrame>
+#include <QPointer>
 #include <QPoint>
+#include <QFrame>
 
 #include "ads/API.h"
 #include "ads/SectionContent.h"
diff --git a/AdvancedDockingSystem/include/ads/SectionWidget.h b/AdvancedDockingSystem/include/ads/SectionWidget.h
index 9e00255..9a58487 100644
--- a/AdvancedDockingSystem/include/ads/SectionWidget.h
+++ b/AdvancedDockingSystem/include/ads/SectionWidget.h
@@ -2,8 +2,8 @@
 #define SECTION_WIDGET_H
 
 #include <QDebug>
+#include <QPointer>
 #include <QList>
-#include <QHash>
 #include <QFrame>
 class QBoxLayout;
 class QStackedLayout;
@@ -56,7 +56,7 @@ private slots:
 private:
 	const int _uid;
 
-	ContainerWidget* _container;
+	QPointer<ContainerWidget> _container;
 	QList<SectionContent::RefPtr> _contents;
 	QList<SectionTitleWidget*> _sectionTitles;
 	QList<SectionContentWidget*> _sectionContents;
@@ -69,12 +69,6 @@ private:
 	SectionTitleWidget* _mousePressTitleWidget;
 
 	static int GetNextUid();
-	static QHash<int, SectionWidget*>& GetLookupMap();
-	static QHash<ContainerWidget*, QHash<int, SectionWidget*> >& GetLookupMapByContainer();
-
-//	static int NextUid;
-//	static QHash<int, SectionWidget*> LookupMap;
-//	static QHash<ContainerWidget*, QHash<int, SectionWidget*> > LookupMapByContainer;
 };
 
 ADS_NAMESPACE_END
diff --git a/AdvancedDockingSystem/res/stylesheets/vendor-partsolutions.css b/AdvancedDockingSystem/res/stylesheets/vendor-partsolutions.css
index 0d6262a..ee7ed2a 100644
--- a/AdvancedDockingSystem/res/stylesheets/vendor-partsolutions.css
+++ b/AdvancedDockingSystem/res/stylesheets/vendor-partsolutions.css
@@ -34,6 +34,12 @@ ads--SectionTitleWidget[activeTab="true"], SectionTitleWidget[activeTab="true"]
 	border: 1px solid #E7F3F8;
 }
 
+ads--SectionWidget QPushButton#closeButton, SectionWidget QPushButton#closeButton,
+ads--FloatingWidget QPushButton#closeButton, FloatingWidget QPushButton#closeButton {
+	background: #ff0000;
+	border: 1px solid red;
+}
+
 ads--SectionContentWidget, SectionContentWidget {
 	background: #ffffff;
 	border: 0px solid #E7F3F8;
diff --git a/AdvancedDockingSystem/src/API.cpp b/AdvancedDockingSystem/src/API.cpp
index fbe8dc9..0c8b66d 100644
--- a/AdvancedDockingSystem/src/API.cpp
+++ b/AdvancedDockingSystem/src/API.cpp
@@ -2,8 +2,10 @@
 
 #include <QWidget>
 #include <QSplitter>
+#include <QLayout>
 
 #include "ads/ContainerWidget.h"
+#include "ads/SectionWidget.h"
 
 ADS_NAMESPACE_BEGIN
 
diff --git a/AdvancedDockingSystem/src/ContainerWidget.cpp b/AdvancedDockingSystem/src/ContainerWidget.cpp
index 43fe103..12469c3 100644
--- a/AdvancedDockingSystem/src/ContainerWidget.cpp
+++ b/AdvancedDockingSystem/src/ContainerWidget.cpp
@@ -1,7 +1,4 @@
 #include "ads/ContainerWidget.h"
-#include "ads/Internal.h"
-#include "ads/SectionTitleWidget.h"
-#include "ads/SectionContentWidget.h"
 
 #include <QPaintEvent>
 #include <QPainter>
@@ -10,6 +7,13 @@
 #include <QSplitter>
 #include <QDataStream>
 #include <QtGlobal>
+#include <QGridLayout>
+#include <QPoint>
+
+#include "ads/Internal.h"
+#include "ads/SectionWidget.h"
+#include "ads/SectionTitleWidget.h"
+#include "ads/SectionContentWidget.h"
 
 ADS_NAMESPACE_BEGIN
 
@@ -37,6 +41,27 @@ ContainerWidget::ContainerWidget(QWidget *parent) :
 	setLayout(_mainLayout);
 }
 
+ContainerWidget::~ContainerWidget()
+{
+	// Note: It's required to delete in 2 steps
+	// Remove from list, and then delete.
+	// Because the destrcutor of objects wants to modfiy the current
+	// iterating list as well... :-/
+	while (!_sections.isEmpty())
+	{
+		SectionWidget* sw = _sections.takeLast();
+		delete sw;
+	}
+	while (!_floatings.isEmpty())
+	{
+		FloatingWidget* fw = _floatings.takeLast();
+		delete fw;
+	}
+	_scLookupMapById.clear();
+	_scLookupMapByName.clear();
+	_swLookupMapById.clear();
+}
+
 Qt::Orientation ContainerWidget::orientation() const
 {
 	return _orientation;
@@ -70,7 +95,12 @@ SectionWidget* ContainerWidget::addSectionContent(const SectionContent::RefPtr&
 	data.content = sc;
 	data.titleWidget = new SectionTitleWidget(sc, NULL);
 	data.contentWidget = new SectionContentWidget(sc, NULL);
+
+#if QT_VERSION >= 0x050000
 	QObject::connect(data.titleWidget, &SectionTitleWidget::activeTabChanged, this, &ContainerWidget::onActiveTabChanged);
+#else
+	QObject::connect(data.titleWidget, SIGNAL(activeTabChanged()), this, SLOT(onActiveTabChanged()));
+#endif
 
 	return dropContent(data, sw, area, false);
 }
@@ -96,7 +126,7 @@ bool ContainerWidget::showSectionContent(const SectionContent::RefPtr& sc)
 		hsi.data.titleWidget->setVisible(true);
 		hsi.data.contentWidget->setVisible(true);
 		SectionWidget* sw = NULL;
-		if (hsi.preferredSectionId > 0 && (sw = SectionWidget::GetLookupMap().value(hsi.preferredSectionId)) != NULL)
+		if (hsi.preferredSectionId > 0 && (sw = SWLookupMapById(this).value(hsi.preferredSectionId)) != NULL)
 		{
 			sw->addContent(hsi.data, true);
 			return true;
@@ -343,7 +373,7 @@ QByteArray ContainerWidget::saveState() const
 		while (iter.hasNext())
 		{
 			iter.next();
-			if (iter.value().preferredSectionId <= 0 || !SectionWidget::GetLookupMap().contains(iter.value().preferredSectionId))
+			if (iter.value().preferredSectionId <= 0 || !SWLookupMapById(this).contains(iter.value().preferredSectionId))
 				cnt++;
 		}
 		out << cnt;
@@ -351,7 +381,7 @@ QByteArray ContainerWidget::saveState() const
 		while (iter.hasNext())
 		{
 			iter.next();
-			if (iter.value().preferredSectionId <= 0 || !SectionWidget::GetLookupMap().contains(iter.value().preferredSectionId))
+			if (iter.value().preferredSectionId <= 0 || !SWLookupMapById(this).contains(iter.value().preferredSectionId))
 				out << iter.value().data.content->uniqueName();
 		}
 	}
@@ -417,7 +447,7 @@ bool ContainerWidget::restoreState(const QByteArray& data)
 			QString uname;
 			in >> uname;
 
-			const SectionContent::RefPtr sc = SectionContent::GetLookupMapByName().value(uname);
+			const SectionContent::RefPtr sc = SCLookupMapByName(this).value(uname);
 			if (!sc)
 				continue;
 
@@ -442,7 +472,7 @@ bool ContainerWidget::restoreState(const QByteArray& data)
 		{
 			QString uname;
 			in >> uname;
-			const SectionContent::RefPtr sc = SectionContent::GetLookupMapByName().value(uname);
+			const SectionContent::RefPtr sc = SCLookupMapByName(this).value(uname);
 			if (!sc)
 				continue;
 
@@ -478,7 +508,7 @@ bool ContainerWidget::restoreState(const QByteArray& data)
 			contents.append(contentsToHide.at(i));
 
 		// Compare restored contents with available contents
-		const QList<SectionContent::WeakPtr> allContents = SectionContent::GetLookupMap().values();
+		const QList<SectionContent::WeakPtr> allContents = SCLookupMapById(this).values();
 		for (int i = 0; i < allContents.count(); ++i)
 		{
 			const SectionContent::RefPtr sc = allContents.at(i).toStrongRef();
@@ -885,7 +915,7 @@ bool ContainerWidget::restoreFloatingWidgets(QDataStream& in, int version, QList
 		in >> visible;
 		qDebug() << "Restore FloatingWidget" << uname << geom << visible;
 
-		const SectionContent::RefPtr sc = SectionContent::GetLookupMapByName().value(uname).toStrongRef();
+		const SectionContent::RefPtr sc = SCLookupMapByName(this).value(uname).toStrongRef();
 		if (!sc)
 		{
 			qWarning() << "Can not find SectionContent:" << uname;
@@ -963,7 +993,7 @@ bool ContainerWidget::restoreSectionWidgets(QDataStream& in, int version, QSplit
 			int preferredIndex = -1;
 			in >> preferredIndex;
 
-			const SectionContent::RefPtr sc = SectionContent::GetLookupMapByName().value(uname).toStrongRef();
+			const SectionContent::RefPtr sc = SCLookupMapByName(this).value(uname).toStrongRef();
 			if (!sc)
 			{
 				qWarning() << "Can not find SectionContent:" << uname;
@@ -1039,7 +1069,7 @@ void ContainerWidget::onActionToggleSectionContentVisibility(bool visible)
 	if (!a)
 		return;
 	const int uid = a->property("uid").toInt();
-	const SectionContent::RefPtr sc = SectionContent::GetLookupMap().value(uid).toStrongRef();
+	const SectionContent::RefPtr sc = SCLookupMapById(this).value(uid).toStrongRef();
 	if (sc.isNull())
 	{
 		qCritical() << "Can not find content by ID" << uid;
diff --git a/AdvancedDockingSystem/src/SectionContent.cpp b/AdvancedDockingSystem/src/SectionContent.cpp
index 254e1c4..13a750b 100644
--- a/AdvancedDockingSystem/src/SectionContent.cpp
+++ b/AdvancedDockingSystem/src/SectionContent.cpp
@@ -1,8 +1,12 @@
 #include "ads/SectionContent.h"
 
 #include <QDebug>
+#include <QWidget>
 #include <QLabel>
 
+#include "ads/Internal.h"
+#include "ads/ContainerWidget.h"
+
 ADS_NAMESPACE_BEGIN
 
 SectionContent::SectionContent() :
@@ -17,7 +21,7 @@ SectionContent::RefPtr SectionContent::newSectionContent(const QString& uniqueNa
 		qFatal("Can not create SectionContent with empty uniqueName");
 		return RefPtr();
 	}
-	else if (GetLookupMapByName().contains(uniqueName))
+	else if (SCLookupMapByName(container).contains(uniqueName))
 	{
 		qFatal("Can not create SectionContent with already used uniqueName");
 		return RefPtr();
@@ -34,17 +38,18 @@ SectionContent::RefPtr SectionContent::newSectionContent(const QString& uniqueNa
 	sc->_titleWidget = title;
 	sc->_contentWidget = content;
 
-	GetLookupMap().insert(sc->uid(), sc);
-	if (!sc->uniqueName().isEmpty())
-		GetLookupMapByName().insert(sc->uniqueName(), sc);
-
+	SCLookupMapById(container).insert(sc->uid(), sc);
+	SCLookupMapByName(container).insert(sc->uniqueName(), sc);
 	return sc;
 }
 
 SectionContent::~SectionContent()
 {
-	GetLookupMap().remove(_uid);
-	GetLookupMapByName().remove(_uniqueName);
+	if (_containerWidget)
+	{
+		SCLookupMapById(_containerWidget).remove(_uid);
+		SCLookupMapByName(_containerWidget).remove(_uniqueName);
+	}
 	delete _titleWidget;
 	delete _contentWidget;
 }
@@ -97,16 +102,4 @@ int SectionContent::GetNextUid()
 	return ++NextUid;
 }
 
-QHash<int, SectionContent::WeakPtr>& SectionContent::GetLookupMap()
-{
-	static QHash<int, SectionContent::WeakPtr> LookupMap;
-	return LookupMap;
-}
-
-QHash<QString, SectionContent::WeakPtr>& SectionContent::GetLookupMapByName()
-{
-	static QHash<QString, SectionContent::WeakPtr> LookupMapByName;
-	return LookupMapByName;
-}
-
 ADS_NAMESPACE_END
diff --git a/AdvancedDockingSystem/src/SectionWidget.cpp b/AdvancedDockingSystem/src/SectionWidget.cpp
index d038afe..7cd1c34 100644
--- a/AdvancedDockingSystem/src/SectionWidget.cpp
+++ b/AdvancedDockingSystem/src/SectionWidget.cpp
@@ -73,16 +73,17 @@ SectionWidget::SectionWidget(ContainerWidget* parent) :
 	setGraphicsEffect(shadow);
 #endif
 
-	GetLookupMap().insert(_uid, this);
-	GetLookupMapByContainer()[_container].insert(_uid, this);
+	SWLookupMapById(_container).insert(_uid, this);
 }
 
 SectionWidget::~SectionWidget()
 {
 	qDebug() << Q_FUNC_INFO;
-	GetLookupMap().remove(_uid);
-	GetLookupMapByContainer()[_container].remove(_uid);
-	_container->_sections.removeAll(this); // Note: I don't like this here, but we have to remove it from list...
+	if (_container)
+	{
+		SWLookupMapById(_container).remove(_uid);
+		_container->_sections.removeAll(this); // Note: I don't like this here, but we have to remove it from list...
+	}
 
 	// Delete empty QSplitter.
 	QSplitter* splitter = findParentSplitter(this);
@@ -324,17 +325,17 @@ int SectionWidget::GetNextUid()
 	return ++NextUid;
 }
 
-QHash<int, SectionWidget*>& SectionWidget::GetLookupMap()
-{
-	static QHash<int, SectionWidget*> LookupMap;
-	return LookupMap;
+//QHash<int, SectionWidget*>& SectionWidget::GetLookupMap()
+//{
+//	static QHash<int, SectionWidget*> LookupMap;
+//	return LookupMap;
 
-}
+//}
 
-QHash<ContainerWidget*, QHash<int, SectionWidget*> >& SectionWidget::GetLookupMapByContainer()
-{
-	static QHash<ContainerWidget*, QHash<int, SectionWidget*> > LookupMapByContainer;
-	return LookupMapByContainer;
-}
+//QHash<ContainerWidget*, QHash<int, SectionWidget*> >& SectionWidget::GetLookupMapByContainer()
+//{
+//	static QHash<ContainerWidget*, QHash<int, SectionWidget*> > LookupMapByContainer;
+//	return LookupMapByContainer;
+//}
 
 ADS_NAMESPACE_END
diff --git a/AdvancedDockingSystemDemo/src/mainwindow.cpp b/AdvancedDockingSystemDemo/src/mainwindow.cpp
index 9174d14..cd7b82e 100644
--- a/AdvancedDockingSystemDemo/src/mainwindow.cpp
+++ b/AdvancedDockingSystemDemo/src/mainwindow.cpp
@@ -8,6 +8,7 @@
 #include <QFrame>
 #include <QTreeView>
 #include <QFileSystemModel>
+#include <QBoxLayout>
 
 #include "ads/SectionWidget.h"
 
@@ -93,7 +94,11 @@ MainWindow::MainWindow(QWidget *parent) :
 
 	_container = new ADS_NS::ContainerWidget();
 	_container->setOrientation(Qt::Vertical);
+#if QT_VERSION >= 0x050000
 	QObject::connect(_container, &ADS_NS::ContainerWidget::activeTabChanged, this, &MainWindow::onActiveTabChanged);
+#else
+	QObject::connect(_container, SIGNAL(activeTabChanged(SectionContent::RefPtr,bool)), this, SLOT(onActiveTabChanged(const::ads::SectionContent::RefPtr&,bool)));
+#endif
 	setCentralWidget(_container);
 
 	// Test #1: Use high-level public API
@@ -123,6 +128,7 @@ MainWindow::~MainWindow()
 
 void MainWindow::onActiveTabChanged(const ADS_NS::SectionContent::RefPtr& sc, bool active)
 {
+	Q_UNUSED(active);
 	IconTitleWidget* itw = dynamic_cast<IconTitleWidget*>(sc->titleWidget());
 	if (itw)
 	{
diff --git a/README.md b/README.md
index bf3304e..832d9b4 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,8 @@ Items sorted by priority
 - [x] Add "title" to SectionContent object, which will be used in visible areas to display contents name.
 - [x] It should be possible to catch the "activeTabChanged" signal for EXTERN_API users
 - [x] Add API function to set an SC as active-tab
+- [ ] Move all lookup maps into ContainterWidget as non-static members, otherwise we can not have the same SC name inside another ContainerWidget instance.
+      The uniqueness of a SectionContainer needs to be restricted to its parent ContainerWidget, not global!
 - [ ] Use scrolling for SectionWidget tabs?
 
 ### Some day...