diff -urN qt-everywhere-opensource-src-4.7.4-a/src/network/ssl/qsslsocket.cpp qt-everywhere-opensource-src-4.7.4-b/src/network/ssl/qsslsocket.cpp
--- qt-everywhere-opensource-src-4.7.4-a/src/network/ssl/qsslsocket.cpp	2011-08-23 13:02:27.000000000 +0100
+++ qt-everywhere-opensource-src-4.7.4-b/src/network/ssl/qsslsocket.cpp	2011-11-18 21:05:14.485910904 +0000
@@ -730,7 +730,11 @@
 #endif
     Q_D(QSslSocket);
     if (d->plainSocket)
+    {
         d->plainSocket->close();
+        delete d->plainSocket;
+        d->plainSocket = 0;
+    }
     QTcpSocket::close();
 
     // must be cleared, reading/writing not possible on closed socket: