Index: synfig-studio/src/gtkmm/duckmatic.cpp
===================================================================
--- synfig-studio/src/gtkmm/duckmatic.cpp	(revision 1877)
+++ synfig-studio/src/gtkmm/duckmatic.cpp	(working copy)
@@ -1568,6 +1568,7 @@
 							synfigapp::ValueDesc(value_node,i)));
 					duck->set_value_desc(synfigapp::ValueDesc(value_node,i));
 
+					bezier->parent_bline_id = value_node->get_guid();
 					add_bezier(bezier);
 					bezier=0;
 				}
@@ -1693,6 +1694,7 @@
 						synfigapp::ValueDesc(value_node,first)));
 				duck->set_value_desc(synfigapp::ValueDesc(value_node,first));
 
+				bezier->parent_bline_id = value_node->get_guid();
 				add_bezier(bezier);
 				bezier=0;
 			}
Index: synfig-studio/src/gtkmm/canvasview.cpp
===================================================================
--- synfig-studio/src/gtkmm/canvasview.cpp	(revision 1877)
+++ synfig-studio/src/gtkmm/canvasview.cpp	(working copy)
@@ -53,6 +53,10 @@
 #include <synfig/valuenode_dynamiclist.h>
 #include <synfig/valuenode_twotone.h>
 #include <synfig/valuenode_stripes.h>
+#include <synfig/valuenode_blinecalcvertex.h>
+#include <synfig/valuenode_bline.h>
+#include <synfig/blinepoint.h>
+#include <synfig/curve_helper.h>
 #include <synfig/layer.h>
 
 #include <synfigapp/uimanager.h>
@@ -2581,6 +2585,79 @@
 bool
 CanvasView::on_duck_changed(const synfig::Point &value,const synfigapp::ValueDesc& value_desc)
 {
+	if( ValueNode_BLineCalcVertex::Handle bline_vertex =
+		ValueNode_BLineCalcVertex::Handle::cast_dynamic(value_desc.get_value_node())
+	)
+	{
+		WorkArea* w_area = get_work_area();
+	    float bezier_pos;
+		float radius( ( abs( w_area->get_pw() ) + abs( w_area->get_ph() ) ) * 4 );
+		Real 	d,step;
+		float 	time = 0;
+		float 	best_time = 0;
+		int best_index = 0;
+
+		if(radius==0)radius=10000000;
+		Real closest(10000000);
+
+		int i = 0;
+		for(std::list<handle<Duckmatic::Bezier> >::const_iterator iter=w_area->bezier_list().begin();iter!=w_area->bezier_list().end();++iter)
+		{
+			if((*iter)->parent_bline_id != bline_vertex->get_link(0)->get_guid())
+				continue;
+			
+			i++;
+			
+			bezier<Point>	curve;
+
+			curve[0] = (*iter)->p1->get_trans_point();
+			curve[1] = (*iter)->c1->get_trans_point();
+			curve[2] = (*iter)->c2->get_trans_point();
+			curve[3] = (*iter)->p2->get_trans_point();
+			curve.sync();
+
+			#if 0
+			// I don't know why this doesn't work
+			time=curve.find_closest(pos,6);
+			d=((curve(time)-pos).mag_squared());
+
+			#else
+			//set the step size based on the size of the picture
+			d = (curve[1] - curve[0]).mag() + (curve[2]-curve[1]).mag()	+ (curve[3]-curve[2]).mag();
+
+			step = d/(2*radius); //want to make the distance between lines happy
+
+			step = max(step,0.01); //100 samples should be plenty
+			step = min(step,0.1); //10 is minimum
+
+			d = find_closest(curve,value,step,&closest,&time);
+			#endif
+
+			if(d < closest)
+			{
+				closest = d;
+				best_time = time;
+				best_index = i;
+			}
+
+		}
+
+		if(closest < radius*radius)
+		{
+			ValueNode_DynamicList::Handle bline_value_node(ValueNode_DynamicList::Handle::cast_dynamic(bline_vertex->get_link(0)));
+			bool loop(bline_value_node->get_loop());
+			int loop_adjust(loop ? 0 : -1);
+			const std::vector<ValueBase> bline((*bline_value_node)(time));
+			int size = bline.size();
+			Real amount = (best_index + best_time + loop_adjust) / (size + loop_adjust);
+
+			return canvas_interface()->change_value(synfigapp::ValueDesc(bline_vertex,2), amount);
+		}
+		else
+			return true;
+
+	}
+
 	switch(value_desc.get_value_type())
 	{
 	case ValueBase::TYPE_REAL:
Index: synfig-studio/src/gtkmm/duckmatic.h
===================================================================
--- synfig-studio/src/gtkmm/duckmatic.h	(revision 1877)
+++ synfig-studio/src/gtkmm/duckmatic.h	(working copy)
@@ -425,6 +425,8 @@
 	bool is_valid()const { return p1 && p2 && c1 && c2; }
 
 	sigc::signal<void,float> &signal_user_click(int i=0) { assert(i>=0); assert(i<5); return signal_user_click_[i]; }
+	
+	synfig::GUID parent_bline_id;
 }; // END of struct Duckmatic::Bezier
 
 /*! \struct Duckmatic::Stroke
Index: synfig-studio/src/synfigapp/instance.cpp
===================================================================
--- synfig-studio/src/synfigapp/instance.cpp	(revision 1877)
+++ synfig-studio/src/synfigapp/instance.cpp	(working copy)
@@ -38,6 +38,7 @@
 #include <synfig/valuenode_composite.h>
 #include <synfig/valuenode_radialcomposite.h>
 #include <synfig/valuenode_reference.h>
+#include <synfig/valuenode_blinecalcvertex.h>
 #include <map>
 
 #include "general.h"
@@ -67,6 +68,7 @@
 		|| ValueNode_Composite::Handle::cast_dynamic(value_node)
 		|| ValueNode_RadialComposite::Handle::cast_dynamic(value_node)
 		|| ValueNode_Reference::Handle::cast_dynamic(value_node)
+		|| ValueNode_BLineCalcVertex::Handle::cast_dynamic(value_node)
 	)
 		return true;
 	return false;