diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index bdedc9d..f6c2c8e 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1928,6 +1928,7 @@ void QGuiApplicationPrivate::processThemeChanged(QWindowSystemInterfacePrivate::
         self->notifyThemeChanged();
     if (QWindow *window  = tce->window.data()) {
         QEvent e(QEvent::ThemeChange);
+        qDebug() << __FUNCTION__;
         QGuiApplication::sendSpontaneousEvent(window, &e);
     }
 }
diff --git a/src/gui/kernel/qpalette.cpp b/src/gui/kernel/qpalette.cpp
index f284c20..5f7bf5a 100644
--- a/src/gui/kernel/qpalette.cpp
+++ b/src/gui/kernel/qpalette.cpp
@@ -1141,9 +1141,30 @@ Q_GUI_EXPORT QPalette qt_fusionPalette()
 }
 
 #ifndef QT_NO_DEBUG_STREAM
-QDebug operator<<(QDebug dbg, const QPalette &)
+QDebug operator<<(QDebug dbg, const QPalette &p)
 {
-    dbg.nospace() << "QPalette()";
+    QString s;
+    QTextStream str(&s);
+    str << "QPalette(currentColorGroup=" << p.currentColorGroup() << '\n';
+    for (int r = 0; r < QPalette::NColorRoles; r++) {
+        str << "Role ";
+        const int ofw = str.fieldWidth();
+        str.setFieldWidth(2);
+        str << r;
+        str.setFieldWidth(ofw);
+        str << ((p.resolve() & (1<<r)) ? "   " : " un") << "resolved: ";
+        for (int g = 0; g < QPalette::NColorGroups; ++g ) {
+            if (g)
+                str << ',';
+            str << "group " << g << '=' << hex << showbase
+                << p.color(QPalette::ColorGroup(g),
+                           QPalette::ColorRole(r)).rgba()
+                <<  noshowbase << dec;
+        }
+        str << '\n';
+    }
+    str << ')';
+    dbg.nospace() << s;
     return dbg.space();
 }
 #endif
diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp
index 6349c1e..67d266c 100644
--- a/src/plugins/platforms/windows/qwindowstheme.cpp
+++ b/src/plugins/platforms/windows/qwindowstheme.cpp
@@ -230,12 +230,17 @@ static inline QPalette toolTipPalette(const QPalette &systemPalette)
     result.setColor(QPalette::All, QPalette::Text, tipTextColor);
     result.setColor(QPalette::All, QPalette::WindowText, tipTextColor);
     result.setColor(QPalette::All, QPalette::ButtonText, tipTextColor);
+    result.setColor(QPalette::All, QPalette::ToolTipBase, tipBgColor);
+    result.setColor(QPalette::All, QPalette::ToolTipText, tipTextColor);
     const QColor disabled =
         mixColors(result.foreground().color(), result.button().color());
     result.setColor(QPalette::Disabled, QPalette::WindowText, disabled);
     result.setColor(QPalette::Disabled, QPalette::Text, disabled);
+    result.setColor(QPalette::Disabled, QPalette::ToolTipText, disabled);
     result.setColor(QPalette::Disabled, QPalette::Base, Qt::white);
     result.setColor(QPalette::Disabled, QPalette::BrightText, Qt::white);
+    result.setColor(QPalette::Disabled, QPalette::ToolTipBase, Qt::white);
+    qDebug() << __FILE__ << __FUNCTION__ << result << '\n';
     return result;
 }
 
diff --git a/src/widgets/kernel/qapplication_qpa.cpp b/src/widgets/kernel/qapplication_qpa.cpp
index c68bcc7..5213a73 100644
--- a/src/widgets/kernel/qapplication_qpa.cpp
+++ b/src/widgets/kernel/qapplication_qpa.cpp
@@ -444,6 +444,7 @@ void QApplication::alert(QWidget *widget, int duration)
 
 void qt_init(QApplicationPrivate *priv, int type)
 {
+    qDebug() << __FUNCTION__;
     Q_UNUSED(priv);
     Q_UNUSED(type);
 
diff --git a/src/widgets/kernel/qtooltip.cpp b/src/widgets/kernel/qtooltip.cpp
index 5aea55e..7e1ad40 100644
--- a/src/widgets/kernel/qtooltip.cpp
+++ b/src/widgets/kernel/qtooltip.cpp
@@ -601,6 +601,7 @@ QFont QToolTip::font()
 */
 void QToolTip::setPalette(const QPalette &palette)
 {
+    qDebug() << __FUNCTION__ << palette << '\n';
     *tooltip_palette() = palette;
     if (QTipLabel::instance)
         QTipLabel::instance->setPalette(palette);
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 7eecd3d..ae9c1ff 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -4215,6 +4215,7 @@ void QWidget::setPalette(const QPalette &palette)
     // propagate this palette to this widget's children.
     QPalette naturalPalette = d->naturalWidgetPalette(d->inheritedPaletteResolveMask);
     QPalette resolvedPalette = palette.resolve(naturalPalette);
+    qDebug() << __FUNCTION__ <<  this << "resolved" << resolvedPalette << '\n';
     d->setPalette_helper(resolvedPalette);
 }
 
@@ -8422,6 +8423,7 @@ void QWidget::changeEvent(QEvent * event)
                 QApplication::style()->polish(this);
             QEvent styleChangedEvent(QEvent::StyleChange);
             QCoreApplication::sendEvent(this, &styleChangedEvent);
+            qDebug() << this << __FUNCTION__ << "ThemeChange";
             if (isVisible())
                 update();
         }