diff -u a/twitter_pull.module b/twitter_pull.module
--- a/twitter_pull.module	2011-02-21 15:28:34.411291135 +0100
+++ b/twitter_pull.module	2011-02-21 15:29:07.384114281 +0100
@@ -97,7 +97,7 @@
 
   $tweets = array();
 
-  if (!empty($cache) && !empty($cache->data)) {
+  if (!empty($cache) && !empty($cache->data) && (time() < $cache->expire)) {
     $tweets =  $cache->data;
   }
   else {