diff -r d32b5fde9ea6 -r 4218782d8ca0 QTfrontend/ui/page/pagemain.cpp
--- a/QTfrontend/ui/page/pagemain.cpp	Tue Jan 17 23:36:15 2012 +0100
+++ b/QTfrontend/ui/page/pagemain.cpp	Tue Jan 17 23:42:30 2012 +0100
@@ -67,6 +67,9 @@
     BtnDataDownload->setWhatsThis(tr("Access the user created content downloadable from our website"));
     pageLayout->setAlignment(BtnDataDownload, Qt::AlignHCenter);
 
+    // disable exit button sound
+    btnBack->isSoundEnabled = false;
+
     return pageLayout;
 }