diff --git a/source/js/jquery-sortable.js b/source/js/jquery-sortable.js
index 8c93d4d..b063745 100644
--- a/source/js/jquery-sortable.js
+++ b/source/js/jquery-sortable.js
@@ -431,7 +431,8 @@
     destroy: function () {
       // TODO iterate over subgroups and destroy them
       // TODO remove all events
-      containerGroups[this.options.group] = undefined
+      delete containerGroups[this.options.group];
+      //containerGroups[this.options.group] = undefined
     }
   }
 
@@ -447,6 +448,8 @@
     var itemPath = this.rootGroup.options.itemPath,
     target = itemPath ? this.el.find(itemPath) : this.el
 
+    this.target = target;
+
     target.on(eventNames.start, this.handle, $.proxy(this.dragInit, this))
 
     if(this.options.drop)
@@ -614,6 +617,8 @@
       return this._serialize(this.el, true)
     },
     destroy: function () {
+      this.target.off( eventNames.start );
+      this.group.containers = [];
       this.rootGroup.destroy()
     }
   }