diff --git a/Polyhedron/demo/Polyhedron/MainWindow_simplify.cpp b/Polyhedron/demo/Polyhedron/MainWindow_simplify.cpp
index cccb524c507..5e6e219f35e 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow_simplify.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow_simplify.cpp
@@ -15,34 +15,35 @@ void MainWindow::on_actionSimplify_triggered()
 		int index = getSelectedPolygonIndex();
 		Polyhedron* pMesh = scene->polyhedron(index);
 
-		// simplify
+                // get option (#edges)
                 bool ok;
 		const unsigned int nb_edges = 
                   QInputDialog::getInteger(this, tr("Stop condition"),
                                            tr("Number of edges:"),
                                            pMesh->size_of_halfedges () / 4, 
                                            // current value: nb of edges /2 
-                                           10, // min
+                                           3, // min
                                            pMesh->size_of_halfedges(), // max
                                            1, // step for the spinbox
                                            &ok);
                 if(!ok) return;
 
-1000; // TODO: should be an option 
-		namespace SMS = CGAL::Surface_mesh_simplification;
-
-		// wait cursor
+		// simplify
+                QTime time;
+        	time.start();
+                std::cout << "Simplify...";
 		QApplication::setOverrideCursor(Qt::WaitCursor);
-
+		namespace SMS = CGAL::Surface_mesh_simplification;
 		SMS::Count_stop_predicate< Polyhedron > stop(nb_edges); // target # edges
 		SMS::edge_collapse( *pMesh, stop,
 		                    CGAL::vertex_index_map(boost::get(CGAL::vertex_external_index,*pMesh))
 				                       .edge_index_map(boost::get(CGAL::edge_external_index,*pMesh)));
 
+                std::cout << "ok (" << time.elapsed() << " ms, " 
+                          << pMesh->size_of_halfedges() / 2 << " edges)" << std::endl;
+
 		// update scene
 		scene->polyhedronChanged(index);
-
-		// default cursor
 		QApplication::restoreOverrideCursor();
 	}
 }
diff --git a/Polyhedron/demo/Polyhedron/MainWindow_subdivision_methods.cpp b/Polyhedron/demo/Polyhedron/MainWindow_subdivision_methods.cpp
index 6dded9de9c9..aedad8b982e 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow_subdivision_methods.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow_subdivision_methods.cpp
@@ -8,7 +8,7 @@ void MainWindow::on_actionLoop_triggered()
 {
   Polyhedron* poly = getSelectedPolygon();
   if(!poly) return;
-  CGAL::Subdivision_method_3::Loop_subdivision(*poly, 1);
+  //CGAL::Subdivision_method_3::Loop_subdivision(*poly, 1);
   scene->polyhedronChanged(poly);
 }
 
@@ -16,7 +16,7 @@ void MainWindow::on_actionCatmullClark_triggered()
 {
   Polyhedron* poly = getSelectedPolygon();
   if(!poly) return;
-  CGAL::Subdivision_method_3::CatmullClark_subdivision(*poly, 1);
+  //CGAL::Subdivision_method_3::CatmullClark_subdivision(*poly, 1);
   scene->polyhedronChanged(poly);
 }
 
@@ -24,7 +24,7 @@ void MainWindow::on_actionSqrt3_triggered()
 {
   Polyhedron* poly = getSelectedPolygon();
   if(!poly) return;
-  CGAL::Subdivision_method_3::Sqrt3_subdivision(*poly, 1);
+  //CGAL::Subdivision_method_3::Sqrt3_subdivision(*poly, 1);
   scene->polyhedronChanged(poly);
 }
 
diff --git a/Polyhedron/demo/Polyhedron/Scene.cpp b/Polyhedron/demo/Polyhedron/Scene.cpp
index 5dff1975f76..0ca59292e15 100644
--- a/Polyhedron/demo/Polyhedron/Scene.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene.cpp
@@ -75,9 +75,12 @@ Scene::open(QString filename)
     QApplication::restoreOverrideCursor();
 		cerr << QString("\n");
 		destroy(poly);
+    
+    delete poly;
     return -1;
   }
 
+  cerr << QString("ok\n");
   addPolyhedron(poly, fileinfo.baseName());
   QApplication::restoreOverrideCursor();