diff -ur '--exclude=*.mk' '--exclude=mandelbulber' mandelbulber0.94/src/callbacks.cpp mandelbulber0.94-happy_quit/src/callbacks.cpp
--- mandelbulber0.94/src/callbacks.cpp	2010-10-10 11:47:11.000000000 +0100
+++ mandelbulber0.94-happy_quit/src/callbacks.cpp	2010-10-19 09:57:10.000000000 +0100
@@ -349,6 +349,13 @@
 	printf("Rendering terminated\n");
 }
 
+void StopRenderingAndQuit(void)
+{
+    StopRendering(NULL, NULL);
+    gtk_main_quit();
+    printf("Quitting\n");
+}
+
 void PressedApplyBrigtness(GtkWidget *widget, gpointer data)
 {
 	sParamRender params;
diff -ur '--exclude=*.mk' '--exclude=mandelbulber' mandelbulber0.94/src/callbacks.h mandelbulber0.94-happy_quit/src/callbacks.h
--- mandelbulber0.94/src/callbacks.h	2010-10-09 19:54:57.000000000 +0100
+++ mandelbulber0.94-happy_quit/src/callbacks.h	2010-10-19 09:55:34.000000000 +0100
@@ -24,6 +24,7 @@
 gboolean on_dareaSound_expose(GtkWidget *widget, GdkEventExpose *event, gpointer user_data);
 void StartRendering(GtkWidget *widget, gpointer data);
 void StopRendering(GtkWidget *widget, gpointer data);
+void StopRenderingAndQuit(void);
 void PressedApplyBrigtness(GtkWidget *widget, gpointer data);
 void PressedLoadSettings(GtkWidget *widget, gpointer data);
 void PressedSaveSettings(GtkWidget *widget, gpointer data);
diff -ur '--exclude=*.mk' '--exclude=mandelbulber' mandelbulber0.94/src/interface.cpp mandelbulber0.94-happy_quit/src/interface.cpp
--- mandelbulber0.94/src/interface.cpp	2010-10-03 18:44:32.000000000 +0100
+++ mandelbulber0.94-happy_quit/src/interface.cpp	2010-10-19 09:53:07.000000000 +0100
@@ -839,8 +839,8 @@
 	//------------- glowne okno renderowania
 	window2 = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 	gtk_window_set_title(GTK_WINDOW(window2), "Mandelbulb Render Window");
-	g_signal_connect(G_OBJECT(window2), "destroy", G_CALLBACK(gtk_main_quit), NULL);
-	g_signal_connect(G_OBJECT(window2), "delete_event", G_CALLBACK(gtk_main_quit), NULL);
+	g_signal_connect(G_OBJECT(window2), "destroy", G_CALLBACK(StopRenderingAndQuit), NULL);
+	g_signal_connect(G_OBJECT(window2), "delete_event", G_CALLBACK(StopRenderingAndQuit), NULL);
 	gtk_widget_add_events(GTK_WIDGET(window2), GDK_CONFIGURE);
   g_signal_connect(G_OBJECT(window2), "configure-event", G_CALLBACK(WindowReconfigured), NULL);
 
@@ -885,8 +885,8 @@
 
 	window_histogram = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 	gtk_window_set_title(GTK_WINDOW(window_histogram), "left - number of iterations (max 64) / right - number of steps (max. 1000)");
-	g_signal_connect(G_OBJECT(window_histogram), "destroy", G_CALLBACK(gtk_main_quit), NULL);
-	g_signal_connect(G_OBJECT(window_histogram), "delete_event", G_CALLBACK(gtk_main_quit), NULL);
+	g_signal_connect(G_OBJECT(window_histogram), "destroy", G_CALLBACK(StopRenderingAndQuit), NULL);
+	g_signal_connect(G_OBJECT(window_histogram), "delete_event", G_CALLBACK(StopRenderingAndQuit), NULL);
 
 	//glowny box w oknie
 	GtkWidget *box2 = gtk_vbox_new(FALSE, 0);