diff --git i/qt-everywhere-commercial-src-4.7.2/src/gui/widgets/qabstractbutton.cpp w/qt-everywhere-commercial-src-4.7.2/src/gui/widgets/qabstractbutton.cpp
index 216c108..91e09d3 100644
--- i/qt-everywhere-commercial-src-4.7.2/src/gui/widgets/qabstractbutton.cpp
+++ w/qt-everywhere-commercial-src-4.7.2/src/gui/widgets/qabstractbutton.cpp
@@ -1122,6 +1122,9 @@ void QAbstractButton::mouseReleaseEvent(QMouseEvent *e)
         e->accept();
     } else {
         setDown(false);
+        repaint(); //flush paint event before invoking potentially expensive operation
+        QApplication::flush();
+        d->emitReleased();
         e->ignore();
     }
 }
@@ -1274,8 +1277,14 @@ void QAbstractButton::focusInEvent(QFocusEvent *e)
 void QAbstractButton::focusOutEvent(QFocusEvent *e)
 {
     Q_D(QAbstractButton);
-    if (e->reason() != Qt::PopupFocusReason)
-        d->down = false;
+    if (e->reason() != Qt::PopupFocusReason) {
+        if (d->down) {
+            setDown(false);
+            repaint(); //flush paint event before invoking potentially expensive operation
+            QApplication::flush();
+            d->emitReleased();
+        }
+    }
     QWidget::focusOutEvent(e);
 }
 
@@ -1285,8 +1294,14 @@ void QAbstractButton::changeEvent(QEvent *e)
     Q_D(QAbstractButton);
     switch (e->type()) {
     case QEvent::EnabledChange:
-        if (!isEnabled())
-            setDown(false);
+        if (!isEnabled()) {
+            if (d->down) {
+                setDown(false);
+                repaint(); //flush paint event before invoking potentially expensive operation
+                QApplication::flush();
+                d->emitReleased();
+            }
+        }
         break;
     default:
         d->sizeHint = QSize();