diff -p -up grhino-0.16.0/gutil.cc.strfmt grhino-0.16.0/gutil.cc
--- grhino-0.16.0/gutil.cc.strfmt	2009-12-16 02:27:07.000000000 +0100
+++ grhino-0.16.0/gutil.cc	2009-12-16 02:27:48.000000000 +0100
@@ -27,7 +27,7 @@ void error_message_box(const gtstream &b
 {
 	GtkWidget *dialog = gtk_message_dialog_new(NULL, GTK_DIALOG_MODAL,
 						   GTK_MESSAGE_ERROR, GTK_BUTTONS_OK, 
-						   bufstr.str().c_str());
+						   "%s", bufstr.str().c_str());
 	gtk_dialog_run(GTK_DIALOG(dialog));
 	gtk_widget_destroy(dialog);
 }