rem: ShowMenuItem(menuID, !forceHide); 
add: ShowMenuItem(menuID,  (numSelected <= 1) && !forceHide); 
context: function SetupForwardMenuItem(menuID, numSelected, forceHide){	ShowMenuItem(menuID, !forceHide);	EnableMenuItem(menuID, (numSelected > 0));}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/f9a23563a051b06e7bd54a444582c2666ab0550a/mailContextMenus.js/clean/mailnews/base/resources/content/mailContextMenus.js