diff -r 95a1e550e5b1 -r 8aa0cac741a0 client/js/paper-renderer.js
--- a/client/js/paper-renderer.js	Wed Aug 29 16:35:07 2012 +0200
+++ b/client/js/paper-renderer.js	Wed Aug 29 16:40:31 2012 +0200
@@ -429,8 +429,8 @@
             var _data = {
                 id: Rkns.Utils.getUID('edge'),
                 created_by: this.renderer.renkan.current_user,
-                from: this.from_representation.model.get("id"),
-                to: _target.model.get("id")
+                from: this.from_representation.model.get("_id"),
+                to: _target.model.get("_id")
             };
             this.project.addEdge(_data);
         }