rem: if (markRead) { gDBView.doCommand(nsMsgViewCommandType.markMessagesRead); } else { gDBView.doCommand(nsMsgViewCommandType.markMessagesUnread); } 
add: gDBView.doCommand(markRead ? nsMsgViewCommandType.markMessagesRead : nsMsgViewCommandType.markMessagesUnread); 
context: function MarkSelectedMessagesRead(markRead){    if (markRead) {        gDBView.doCommand(nsMsgViewCommandType.markMessagesRead);    }    else {        gDBView.doCommand(nsMsgViewCommandType.markMessagesUnread);    }}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/91c00f9cca3ccfd7e300b9ad317840efa5e36c01/mailCommands.js/buggy/mailnews/base/resources/content/mailCommands.js