Hi Phil, The %MethodCode of QApplication's dtor (qapplication.sip) doesn't call the C++ destructor. There is a long comment about the order of destruction of top-level widgets vs QApplication, but I can't read it so to imply that it shouldn't call the C++ dtor -- it looks like a genuine bug. -- Giovanni Bajo Develer S.r.l. http://www.develer.com