Index: /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp	(revision 81188)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp	(revision 81189)
@@ -4052,4 +4052,7 @@
 void UIMachineSettingsStorage::sltHandleContextMenuRequest(const QPoint &position)
 {
+    /* Forget last mouse press position: */
+    m_mousePressPosition = QPoint();
+
     const QModelIndex index = m_pTreeStorage->indexAt(position);
     if (!index.isValid())