diff -uprN twitterfox.orig/components/nsTwitterNotifier.js twitterfox.new/components/nsTwitterNotifier.js
--- twitterfox.orig/components/nsTwitterNotifier.js	2008-12-22 04:40:04.000000000 +0100
+++ twitterfox.new/components/nsTwitterNotifier.js	2009-01-11 16:26:06.000000000 +0100
@@ -38,7 +38,7 @@ const CLASS_ID = Components.ID("3c4bfeef
 const CLASS_NAME = "Twitter Notifier";
 const CONTRACT_ID = "@naan.studio/twitternotifier;1";
 const NETWORK_TIMEOUT_TIME = 120;
-const MAX_STORED_MESSAGES = 40;
+const MAX_STORED_MESSAGES = 70;
 
 const TWITTER_API_URL = "https://twitter.com/";
 const APP_NAME = "TwitterFox";
@@ -602,7 +602,12 @@ var twitternotifier_prototypes = {
 
   getTweets: function() {
     if (this._idle == STATE_ACTIVE) {
-      this.get("statuses.friends_timeline");
+      var stored = this._accounts[this._user]["timeline"];
+      var params = {"count": 50};
+      if(stored[0]) {
+        params["since_id"] = stored[0].id;
+      }
+      this.get("statuses.friends_timeline", params);
     }
     else {
       this._idle = STATE_SUSPEND;