diff -r e1752b696a07 -r b6e39f6fd24f src/widgets/Arrow.js
--- a/src/widgets/Arrow.js	Tue Oct 01 16:57:57 2013 +0200
+++ b/src/widgets/Arrow.js	Wed Oct 09 18:40:40 2013 +0200
@@ -25,7 +25,6 @@
         overflow: "hidden"
     });
     this.paper = new Raphael(this.container, this.width, 1+this.height );
-    window.myArrow = this;
     this.svgArrow = this.paper.path('M0,' + this.height + 'L' + this.width + ',' + this.height);
     this.svgArrow.attr({
         stroke: this.stroke_color,