remove the "." from Subscribe. it launches subscribe.xul (in all it's glory) now.

mailnews/base/resources/content/messenger.xul

@@ -45,7 +45,7 @@ Rights Reserved.
 <!ENTITY saveAsTemplateCmd.label ".Template">  
 <!ENTITY getNewMsgCmd.label "Get New Messages">  
 <!ENTITY sendUnsentCmd.label "Send Unsent Messages">  
-<!ENTITY subscribeCmd.label ".Subscribe">  
+<!ENTITY subscribeCmd.label "Subscribe">  
 <!ENTITY emptyTrashCmd.label ".Empty Trash">  
 <!ENTITY importCmd.label ".Import...">  
 <!ENTITY offlineMenu.label ".Offline">