diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/svg/mouse.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/svg/mouse.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,29 @@
+d3.svg.mouse = function(container) {
+  return d3_svg_mousePoint(container, d3.event);
+};
+
+// https://bugs.webkit.org/show_bug.cgi?id=44083
+var d3_mouse_bug44083 = /WebKit/.test(navigator.userAgent) ? -1 : 0;
+
+function d3_svg_mousePoint(container, e) {
+  var point = (container.ownerSVGElement || container).createSVGPoint();
+  if ((d3_mouse_bug44083 < 0) && (window.scrollX || window.scrollY)) {
+    var svg = d3.select(document.body)
+      .append("svg:svg")
+        .style("position", "absolute")
+        .style("top", 0)
+        .style("left", 0);
+    var ctm = svg[0][0].getScreenCTM();
+    d3_mouse_bug44083 = !(ctm.f || ctm.e);
+    svg.remove();
+  }
+  if (d3_mouse_bug44083) {
+    point.x = e.pageX;
+    point.y = e.pageY;
+  } else {
+    point.x = e.clientX;
+    point.y = e.clientY;
+  }
+  point = point.matrixTransform(container.getScreenCTM().inverse());
+  return [point.x, point.y];
+};