diff --git a/lib/storage/ondiskhashedstoragemanager.inc.php b/lib/storage/ondiskhashedstoragemanager.inc.php
index 16f75da..8bde241 100644
--- a/lib/storage/ondiskhashedstoragemanager.inc.php
+++ b/lib/storage/ondiskhashedstoragemanager.inc.php
@@ -157,11 +157,11 @@ class KTOnDiskHashedStorageManager extends KTStorageManager {
             header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
             header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
             // HTTP/1.1
-			header("Cache-Control: no-store, no-cache, must-revalidate");
-			header("Cache-Control: post-check=0, pre-check=0", false);
+            header("Cache-Control: no-store, no-cache, must-revalidate");
+            header("Cache-Control: post-check=0, pre-check=0", false);
 
-			// HTTP/1.0
-			header("Pragma: no-cache");
+            // HTTP/1.0
+            // header("Pragma: no-cache"); // Don't send this header! It breaks IE.
 
             $oFile = new KTFSFileLike($sPath);
             KTFileLikeUtil::send_contents($oFile);
diff --git a/plugins/ktstandard/PDFGeneratorAction.php b/plugins/ktstandard/PDFGeneratorAction.php
index 68cd5b1..be36665 100644
--- a/plugins/ktstandard/PDFGeneratorAction.php
+++ b/plugins/ktstandard/PDFGeneratorAction.php
@@ -223,7 +223,7 @@ class PDFGeneratorAction extends KTDocumentAction {
                 header("Cache-Control: post-check=0, pre-check=0", false);
 
                 // HTTP/1.0
-                header("Pragma: no-cache");
+                // header("Pragma: no-cache"); // Don't send this header! It breaks IE.
                 
                 // Get a filelike object and send it to the browser
                 $oFile = new KTFSFileLike($sTempFilename);