rem: this.mDraggingBox.setAttribute("col-dragging", "false"); 
add: this.mDraggingBox.removeAttribute("col-dragging"); 
context:   setDraggingBox: function(aBox)  {    if (this.mDraggingBox) {      this.mDraggingBox.setAttribute("col-dragging", "false");    }    this.mDraggingBox = aBox;    if (aBox)      aBox.setAttribute("col-dragging", "true");  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/1dc8b67ef1c6d089ea6e41113322d280cba4bbbc/columnsDialog.js/buggy/extensions/inspector/resources/content/viewers/dom/columnsDialog.js