rem: var msgHdr = GetMsgHdrFromUri(sourceUri); var folderUri = msgHdr.folder.URI; SelectFolder(folderUri); 
add: SelectFolder(GetMsgHdrFromUri(sourceUri).folder.URI); 
context:   onDrop: function (aEvent, aData, aDragSession)  {    var sourceUri = aData.data;     if (sourceUri != gCurrentMessageUri)    {      var msgHdr = GetMsgHdrFromUri(sourceUri);      var folderUri = msgHdr.folder.URI;      SelectFolder(folderUri);      SelectMessage(sourceUri);    }  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/3ead8e230bcd0f7a2698ae71d076d3073a8cc53b/messageWindow.js/clean/mailnews/base/resources/content/messageWindow.js