diff --git a/backend.php b/backend.php
index 656dcbf9c..b1ddcd5af 100644
--- a/backend.php
+++ b/backend.php
@@ -1,11 +1,8 @@
 <?php
 	require_once "sessions.php";
 	require_once "modules/backend-rpc.php";
-	
-	header("Cache-Control: no-cache, max-age=0, must-revalidate");
-	header("Pragma: no-cache");
-	header("Expires: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
-	
+
+
 /*	if ($_GET["debug"]) {
 		define('DEFAULT_ERROR_LEVEL', E_ALL);
 	} else {
@@ -23,6 +20,8 @@
 	require_once "db-prefs.php";
 	require_once "functions.php";
 
+	no_cache_incantation();
+
 	$script_started = getmicrotime();
 
 	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	
diff --git a/functions.php b/functions.php
index 49955b63f..f014b8d29 100644
--- a/functions.php
+++ b/functions.php
@@ -3162,4 +3162,13 @@
 		require_once "login_form.php";
 	}
 
+	// from http://developer.apple.com/internet/safari/faq.html
+	function no_cache_incantation() {
+		header("Expires: Mon, 22 Dec 1980 00:00:00 GMT"); // Happy birthday to me :)
+		header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified
+		header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0"); // HTTP/1.1
+		header("Cache-Control: post-check=0, pre-check=0", false);
+		header("Pragma: no-cache"); // HTTP/1.0
+	}
+
 ?>
diff --git a/prefs.php b/prefs.php
index ad77d8662..93c246b90 100644
--- a/prefs.php
+++ b/prefs.php
@@ -12,9 +12,7 @@
 
 	$dt_add = get_script_dt_add();
 
-	header("Cache-Control: no-cache, max-age=0, must-revalidate");
-	header("Pragma: no-cache");
-	header("Expires: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
+	no_cache_incantation();
 
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
diff --git a/tt-rss.php b/tt-rss.php
index ab850f2f4..bc337ee31 100644
--- a/tt-rss.php
+++ b/tt-rss.php
@@ -12,9 +12,7 @@
 
 	$dt_add = get_script_dt_add();
 
-	header("Cache-Control: no-cache, max-age=0, must-revalidate");
-	header("Pragma: no-cache");
-	header("Expires: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
+	no_cache_incantation();
 
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
