rem: if (aFlavour != "application/x-moz-file") return; 
context:   onDragOver: function (aEvent, aFlavour, aDragSession)    {      if (aFlavour != "application/x-moz-file")        return;      var attachmentBucket = document.getElementById("attachmentBucket");      attachmentBucket.setAttribute("dragover", "true");    },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/8c6d09b89b487c70d9d2dc8574ce73f23857e2c9/MsgComposeCommands.js/buggy/mailnews/compose/resources/content/MsgComposeCommands.js