diff --git a/Packages/Snap_rounding_2/demo/Snap_rounding_2/demo_kd_trees.C b/Packages/Snap_rounding_2/demo/Snap_rounding_2/demo_kd_trees.C
index dc797cdfdd3..c5fea912461 100644
--- a/Packages/Snap_rounding_2/demo/Snap_rounding_2/demo_kd_trees.C
+++ b/Packages/Snap_rounding_2/demo/Snap_rounding_2/demo_kd_trees.C
@@ -84,14 +84,14 @@ int main(int argc,char *argv[])
   read_data(argv,prec,seg_list);
 
   for(int i = 1;i < 11;++i) {
-    std::cout << " kd trees parameter is " << i << std::endl;
+    std::cout << "Input number of kd trees : " << i << std::endl;
     CGAL::Timer t;
     t.start();
     CGAL::snap_rounding_2<Sr_traits,std::list<Segment_2>::const_iterator,
       std::list<std::list<Point_2> > >
       (seg_list.begin(),seg_list.end(),output_list,prec,true,false,i);
     t.stop();
-    std::cout << "*** time : " << t.time() << "\n\n";
+    std::cout << "total time : " << t.time() << "\n\n";
   }
 
   delete(is_ptr);
diff --git a/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_2.h b/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_2.h
index 8787a63e4db..9ac00e6e394 100644
--- a/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_2.h
+++ b/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_2.h
@@ -505,7 +505,6 @@ void Snap_rounding_2<Rep_,OutputContainer>::
 
     std::list<X_curve>  subcurves;
 
-
     // get intersection points (with endpoints)
     PointList mypointlist;
 
@@ -681,7 +680,6 @@ void snap_rounding_2(
   InputIterator begin,
   InputIterator end,
   OutputContainer& output_container,
-  //std::list<std::list<typename Rep_::Point_2> >& output_container,
   typename Rep_::FT pixel_size,
   bool do_isr = true,
   bool int_output = true,
@@ -690,6 +688,7 @@ void snap_rounding_2(
     std::list<Segment_data<Rep_> > seg_list;
     Multiple_kd_tree<Rep_,Hot_Pixel<Rep_> *> *mul_kd_tree;
 
+    output_container.clear();
     // copy segments list
     while(begin != end) {
       seg_list.push_back(Segment_data<Rep_>(begin->source(),
diff --git a/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h b/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
index 1fee48c403f..4259efb4d5c 100644
--- a/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
+++ b/Packages/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
@@ -325,15 +325,31 @@ public:
 
     check_kd(kd_counter,number_of_trees,seg_list,directions);
     int ind = 0;
+
+#ifdef KD_DEBUG
+    int number_of_actual_kd_trees = 0;
+#endif
+
     for(NT angle = 0;angle < half_pi;angle += half_pi / number_of_trees) {
       if(kd_counter[ind] >= (double)number_of_segments /
 	                    (double)number_of_trees / 2.0) {
         kd = create_kd_tree(angle);
         kd_trees_list.push_back(kd);
+
+#ifdef KD_DEBUG
+        ++number_of_actual_kd_trees;
+#endif
+
       }
 
       ++ind;
     }
+
+#ifdef KD_DEBUG
+    std::cout << "Actual number of kd-trees created : " << 
+      number_of_actual_kd_trees << std::endl;
+#endif
+
   }
 
   Point_2 small_x_point(Point_2 p1,Point_2 p2)