rem: messenger.saveAttachment(url, displayName, messageUri); 
add: messenger.saveAttachment(contentType, url, displayName, messageUri); 
context: function saveAttachment(contentType, url, displayName, messageUri){  messenger.saveAttachment(url, displayName, messageUri);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/78b42a319abba41832dafaadc93436d6a352ba8e/msgHdrViewOverlay.js/clean/mailnews/base/resources/content/msgHdrViewOverlay.js