--- themer/main.c	2008-09-17 21:29:37.000000000 +0800
+++ themer/main.c.new	2008-10-03 21:33:15.964936316 +0800
@@ -1675,7 +1675,15 @@
     gtk_window_set_default_icon_from_file (PIXMAPS_DIR "/emerald-theme-manager-icon.png", NULL);
 
     gtk_container_set_border_widthC (GTK_CONTAINER (mainWindow), 5);
+	/* Set the colour map */
+	GdkScreen *screen = gtk_widget_get_screen(mainWindow);
+	GdkColormap *colormap = gdk_screen_get_rgba_colormap (screen);
 
+	if (colormap && gdk_screen_is_composited (screen))
+	{
+		gtk_widget_set_default_colormap(colormap);
+	}
+	/* End set colour map */
     layout_main_window();
     gtk_widget_show_all(mainWindow);