rem: var status = treeItem.getAttribute('Status'); var unread = (status == " ") || (status == "new"); 
add: var isUnread = treeItem.getAttribute('IsUnread'); var unread = (isUnread == "true"); 
context: function ToggleMessageRead(treeItem){	var tree = GetThreadTree();	var status = treeItem.getAttribute('Status');	var unread = (status == " ") || (status == "new");	messenger.MarkMessageRead(tree.database, treeItem.resource, unread);}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/eb30692c89dfbf7026937f4e31212c3aea58d3b9/commandglue.js/clean/mailnews/base/resources/content/commandglue.js