diff -r ab7b94c03bc9 -r ba32d3f9e567 QTfrontend/ui/dialog/ask_quit.cpp
--- a/QTfrontend/ui/dialog/ask_quit.cpp	Tue Oct 23 06:50:19 2012 +0200
+++ b/QTfrontend/ui/dialog/ask_quit.cpp	Tue Oct 23 07:03:07 2012 +0200
@@ -58,6 +58,8 @@
     QTimer * timer = new QTimer(this);
     connect(timer, SIGNAL(timeout()), this, SLOT(updateList()));
     timer->start(200);
+
+    this->setWindowModality(Qt::WindowModal);
 }
 
 void HWAskQuitDialog::goToPageVideos()