diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index 0d65811..a42eb31 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -66,6 +66,9 @@
 #include "private/qgraphicssystem_runtime_p.h"
 #endif
 
+#include <QDebug>
+#define TRACE_QTBUG_11376 qDebug() << "[QTBUG-11376]"
+
 #include "apgwgnam.h" // For CApaWindowGroupName
 #include <mdaaudiotoneplayer.h>     // For CMdaAudioToneUtility
 
@@ -353,6 +356,12 @@ QSymbianControl::QSymbianControl(QWidget *w)
 
 void QSymbianControl::ConstructL(bool isWindowOwning, bool desktop)
 {
+    TRACE_QTBUG_11376 << "QSymbianControl::ConstructL" << (void*)this
+                      << "qwidget" << (void*)qwidget
+                      << "qwidget->parentWidget" << (qwidget ? (void*)qwidget->parentWidget() : 0)
+                      << "isWindowOwning" << isWindowOwning
+                      << "desktop" << desktop;
+
     if (!desktop)
     {
         if (isWindowOwning or !qwidget->parentWidget())
@@ -382,6 +391,9 @@ void QSymbianControl::ConstructL(bool isWindowOwning, bool desktop)
 
 QSymbianControl::~QSymbianControl()
 {
+    TRACE_QTBUG_11376 << "QSymbianControl::~QSymbianControl" << (void*)this
+                      << "qwidget" << (void*)qwidget;
+
     if (S60->curWin == this)
         S60->curWin = 0;
     if (!QApplicationPrivate::is_app_closing) {
@@ -397,6 +409,10 @@ QSymbianControl::~QSymbianControl()
 
 void QSymbianControl::setWidget(QWidget *w)
 {
+    TRACE_QTBUG_11376 << "QSymbianControl::setWidget" << (void*)this
+                      << "qwidget" << (void*)qwidget
+                      << "w" << (void*)w;
+
     qwidget = w;
 }
 void QSymbianControl::HandleLongTapEventL( const TPoint& aPenEventLocation, const TPoint& aPenEventScreenLocation )
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index fed8d0a..4d00680 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -123,6 +123,9 @@
 #include "qtabwidget.h" // Needed in inTabWidget()
 #endif // QT_KEYPAD_NAVIGATION
 
+#include <QDebug>
+#define TRACE_QTBUG_11376 qDebug() << "[QTBUG-11376]"
+
 // widget/widget data creation count
 //#define QWIDGET_EXTRA_DEBUG
 //#define ALIEN_DEBUG
@@ -172,18 +175,26 @@ QRefCountedWidgetBackingStore::QRefCountedWidgetBackingStore()
 
 QRefCountedWidgetBackingStore::~QRefCountedWidgetBackingStore()
 {
+    TRACE_QTBUG_11376 << "QRefCountedWidgetBackingStore::~QRefCountedWidgetBackingStore" << (void*)this
+                      << "m_count" << m_count << "m_ptr" << (void*)m_ptr;
     delete m_ptr;
 }
 
 void QRefCountedWidgetBackingStore::create(QWidget *widget)
 {
+    TRACE_QTBUG_11376 << "+ QRefCountedWidgetBackingStore::create" << (void*)this
+                      << "widget" << (void*)widget;
     destroy();
     m_ptr = new QWidgetBackingStore(widget);
+    TRACE_QTBUG_11376 << "- QRefCountedWidgetBackingStore::create" << (void*)this
+                      << "m_ptr" << (void*)m_ptr;
     m_count = 0;
 }
 
 void QRefCountedWidgetBackingStore::destroy()
 {
+    TRACE_QTBUG_11376 << "QRefCountedWidgetBackingStore::destroy" << (void*)this
+                      << "m_count" << m_count << "m_ptr" << (void*)m_ptr;
     delete m_ptr;
     m_ptr = 0;
     m_count = 0;
@@ -191,12 +202,16 @@ void QRefCountedWidgetBackingStore::destroy()
 
 void QRefCountedWidgetBackingStore::ref()
 {
+    TRACE_QTBUG_11376 << "QRefCountedWidgetBackingStore::ref" << (void*)this
+                      << "m_count" << m_count << "m_ptr" << (void*)m_ptr;
     Q_ASSERT(m_ptr);
     ++m_count;
 }
 
 void QRefCountedWidgetBackingStore::deref()
 {
+    TRACE_QTBUG_11376 << "QRefCountedWidgetBackingStore::deref" << (void*)this
+                      << "m_count" << m_count << "m_ptr" << (void*)m_ptr;
     if (m_count) {
         Q_ASSERT(m_ptr);
         if (0 == --m_count) {
@@ -9831,6 +9846,10 @@ void QWidget::setWindowFlags(Qt::WindowFlags flags)
     if (data->window_flags == flags)
         return;
 
+    TRACE_QTBUG_11376 << "QWidget::setWindowFlags" << (void*)this
+                      << "this.flags" << data->window_flags.operator int()
+                      << "flags" << flags.operator int();
+
     Q_D(QWidget);
 
     if ((data->window_flags | flags) & Qt::Window) {
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index 2818d88..b0ec0e9 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -57,6 +57,9 @@
 #include <eikbtgpc.h>
 #endif
 
+#include <QDebug>
+#define TRACE_QTBUG_11376 qDebug() << "[QTBUG-11376]"
+
 // This is necessary in order to be able to perform delayed invokation on slots
 // which take arguments of type WId.  One example is
 // QWidgetPrivate::_q_delayedDestroy, which is used to delay destruction of
@@ -350,6 +353,9 @@ void QWidgetPrivate::create_sys(WId window, bool /* initializeWindow */, bool de
 
     CCoeControl *const destroyw = destroyOldWindow ? data.winid : 0;
 
+    TRACE_QTBUG_11376 << "QWidgetPrivate::create_sys" << (void*)q
+                      << "window" << window << "destroyw" << destroyw;
+
     createExtra();
     if (window) {
         setWinId(window);
@@ -1080,6 +1086,10 @@ void QWidget::setWindowState(Qt::WindowStates newstate)
 {
     Q_D(QWidget);
 
+    TRACE_QTBUG_11376 << "QWidget::setWindowState" << (void*)this
+                      << "this.state" << windowState().operator int()
+                      << "state" << newstate.operator int();
+
     Qt::WindowStates oldstate = windowState();
 
     const TBool isFullscreen = newstate & Qt::WindowFullScreen;
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 83751ed..689f9f9 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -65,6 +65,9 @@
 #include <private/qwsmanager_p.h>
 #endif
 
+#include <QDebug>
+#define TRACE_QTBUG_11376 qDebug() << "[QTBUG-11376]"
+
 QT_BEGIN_NAMESPACE
 
 extern QRegion qt_dirtyRegion(QWidget *);
@@ -860,6 +863,11 @@ QWidgetBackingStore::QWidgetBackingStore(QWidget *topLevel)
     , fullUpdatePending(0)
 {
     windowSurface = tlw->windowSurface();
+
+    TRACE_QTBUG_11376 << "+ QWidgetBackingStore::QWidgetBackingStore" << (void*)this
+                      << "tlw" << (void*)tlw
+                      << "windowSurface" << (void*)windowSurface;
+
     if (!windowSurface)
         windowSurface = topLevel->d_func()->createDefaultWindowSurface();
 
@@ -872,10 +880,18 @@ QWidgetBackingStore::QWidgetBackingStore(QWidget *topLevel)
 
     // Ensure all existing subsurfaces and static widgets are added to their respective lists.
     updateLists(topLevel);
+
+    TRACE_QTBUG_11376 << "- QWidgetBackingStore::QWidgetBackingStore" << (void*)this
+                      << "tlw" << (void*)tlw
+                      << "windowSurface" << (void*)windowSurface;
 }
 
 QWidgetBackingStore::~QWidgetBackingStore()
 {
+    TRACE_QTBUG_11376 << "QWidgetBackingStore::~QWidgetBackingStore" << (void*)this
+                      << "tlw" << (void*)tlw
+                      << "windowSurface" << (void*)windowSurface;
+
     for (int c = 0; c < dirtyWidgets.size(); ++c) {
         resetWidget(dirtyWidgets.at(c));
     }
diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp
index e3f52f4..0078027 100644
--- a/src/openvg/qwindowsurface_vgegl.cpp
+++ b/src/openvg/qwindowsurface_vgegl.cpp
@@ -45,6 +45,9 @@
 #include "qvgimagepool_p.h"
 #include "qvg_p.h"
 
+#include <QDebug>
+#define TRACE_QTBUG_11376 qDebug() << "[QTBUG-11376]"
+
 #if !defined(QT_NO_EGL)
 
 QT_BEGIN_NAMESPACE
@@ -614,10 +617,16 @@ QVGEGLWindowSurfaceDirect::QVGEGLWindowSurfaceDirect(QWindowSurface *win)
     , needToSwap(false)
     , windowSurface(EGL_NO_SURFACE)
 {
+    TRACE_QTBUG_11376 << "QVGEGLWindowSurfaceDirect::QVGEGLWindowSurfaceDirect" << (void*)this
+                      << "win" << (void*)win;
 }
 
 QVGEGLWindowSurfaceDirect::~QVGEGLWindowSurfaceDirect()
 {
+    TRACE_QTBUG_11376 << "QVGEGLWindowSurfaceDirect::~QVGEGLWindowSurfaceDirect" << (void*)this
+                      << "context" << (void*)context
+                      << "windowSurface" << windowSurface;
+
     destroyPaintEngine();
     if (context) {
         if (windowSurface != EGL_NO_SURFACE)