rem: var frameSrc = themeDisplay.getPathMain() + "/mail/view_message?header=true"; 
add: var frameSrc = themeDisplay.getPathMain() + "/mail/view_message?header=true&messageId=" + Mail.currentMessageId; 
context: 	previewPopup : function() {		var popup = null;				if (Mail.currentMessage) {			var frameSrc = themeDisplay.getPathMain() + "/mail/view_message?header=true";			popup = window.open(frameSrc, "Print", "menubar=yes,width=640,height=480,toolbar=no,resizable=yes");		}				return popup;	},
meta: 10143	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10143/94206ce4a9ff28df83aaa84732337ff5408f5005/mail.js/clean/portal-web/docroot/html/js/portlet/mail.js