add: ClearPendingReadTimer(); 
context: function ClearMessagePane(){  if(gHaveLoadedMessage)  {    gHaveLoadedMessage = false;    gCurrentDisplayedMessage = null;    if (GetMessagePaneFrame().location.href != "about:blank")        GetMessagePaneFrame().location.href = "about:blank";        // hide the message header view AND the message pane...    HideMessageHeaderPane();    gMessageNotificationBar.clearMsgNotifications();  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/df0d52d9516bd6320d464e88bcfbb8acba90c2bd/msgMail3PaneWindow.js/buggy/mail/base/content/msgMail3PaneWindow.js