rem: return true; 
add:  try {  okCallback(gNameTextbox.value, gOldName, gPreselectedFolderURI);  return true; } catch (e) { return false; } 
context: function folderPropsOKButton(){  if (gMsgFolder)  {    // set charset attributes    var folderCharsetList = document.getElementById("folderCharsetList");    gMsgFolder.charset = folderCharsetList.getAttribute("value");    gMsgFolder.charsetOverride = document.getElementById("folderCharsetOverride").checked;    if(document.getElementById("offline.selectForOfflineFolder").checked ||      document.getElementById("offline.selectForOfflineNewsgroup").checked)      gMsgFolder.setFlag(MSG_FOLDER_FLAG_OFFLINE);    else      gMsgFolder.clearFlag(MSG_FOLDER_FLAG_OFFLINE);    if(document.getElementById("folderCheckForNewMessages").checked)      gMsgFolder.setFlag(MSG_FOLDER_FLAG_CHECK_NEW);    else      gMsgFolder.clearFlag(MSG_FOLDER_FLAG_CHECK_NEW);  }  return true;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e2e098639ebdc17fc5b41b39f0e21d6a22d2d48d/folderProps.js/buggy/mailnews/base/resources/content/folderProps.js