Index: frontend/framework/source/class/qx/ui/component/DateChooserButton.js
===================================================================
--- frontend/framework/source/class/qx/ui/component/DateChooserButton.js	(revision 8482)
+++ frontend/framework/source/class/qx/ui/component/DateChooserButton.js	(working copy)
@@ -386,6 +386,11 @@
   */
 
   destruct : function() {
+
+   var chooserWindowParent = this._chooserWindow.getParent();
+   if (chooserWindowParent)
+       chooserWindowParent.remove (this._chooserWindow);
+
     this._disposeObjects("_dateFormat", "_chooser", "_chooserWindow");
   }
 });