Comment 1 for bug 156652

The following (perhaps temporary) fix forces the cache to refetch the object:

# diff -u /usr/share/apt-cacher/apt-cacher.orig /usr/share/apt-cacher/apt-cacher
--- /usr/share/apt-cacher/apt-cacher.orig 2007-10-24 14:57:12.000000000 +0200
+++ /usr/share/apt-cacher/apt-cacher 2007-10-24 14:48:10.000000000 +0200
@@ -1587,7 +1587,7 @@
         $response = $ua->head($url);
     }
     else {
- $response = $ua->get($url, ':content_cb' => \&get_callback, ':read_size_hint' => $getBufLen);
+ $response = $ua->get($url, ':content_cb' => \&get_callback, ':read_size_hint' => $getBufLen, 'Cache-Control' => 'no-cache', 'Pragma' => 'no-cache');
     }

     if($do_hopping) {