Index: /trunk/FACT++/gui/MainWindow.cc
===================================================================
--- /trunk/FACT++/gui/MainWindow.cc	(revision 10935)
+++ /trunk/FACT++/gui/MainWindow.cc	(revision 10936)
@@ -85,7 +85,16 @@
 void MainWindow::slot_TimeUpdate()
 {
-    // Used toTUC to support also older Qt versions
-    fUTC->setDateTime(QDateTime::currentDateTime().toUTC());
-}
+    // Used toUTC to support also older Qt versions
+    // toTime_t() always returns the datetime converted to UTC
+    // dateTime() unfortunately returns our UTC always as LocalTime
+    QDateTime now = QDateTime::currentDateTime().toUTC();
+    now.setTimeSpec(Qt::LocalTime);
+
+    if (now.toTime_t()==fUTC->dateTime().toTime_t())
+        return;
+
+    fUTC->setDateTime(now);
+}
+
 
 void MainWindow::SelectTab(const QString &name)