Index: DownloadAction.java
===================================================================
--- DownloadAction.java	(revision 2695)
+++ DownloadAction.java	(working copy)
@@ -82,6 +82,10 @@
         response.addHeader("Content-disposition", "inline; filename=\"" + ofilename + "\"");
 
         response.setDateHeader("Last-Modified", attachment.getDate().getTime());
+        
+        // No cache directives
+        response.addHeader("Cache-Control", "no-cache");
+        response.addHeader("Pragma", "no-cache");
 
         // Sending the content of the attachment
         byte[] data;
Index: DownloadRevAction.java
===================================================================
--- DownloadRevAction.java	(revision 2695)
+++ DownloadRevAction.java	(working copy)
@@ -53,6 +53,11 @@
         response.setContentType(mimetype);
 
         response.setDateHeader("Last-Modified", attachment.getDate().getTime());
+        
+        // No cache directives
+        response.addHeader("Cache-Control", "no-cache");
+        response.addHeader("Pragma", "no-cache");
+        
         // Sending the content of the attachment
         byte[] data = attachment.getContent(context);
         response.setContentLength(data.length);