Index: indico/MaKaC/webinterface/rh/base.py
===================================================================
--- indico/MaKaC/webinterface/rh/base.py	(revision 5d9c8a6f72127775cab8a1b9349d186fc04900c1)
+++ indico/MaKaC/webinterface/rh/base.py	(revision c3c8d1f6a75661805a8ac4e1c35fc4830f3ac996)
@@ -243,13 +243,12 @@
         """
 
-        self._req.headers_out["Pragma"] = "no-cache"
-
         # IE doesn't seem to like 'no-cache' Cache-Control headers...
         if (re.match(r'.*MSIE.*', self._req.headers_in.get("User-Agent",""))):
+            # actually, the only way to safely disable caching seems to be this one
             self._req.headers_out["Cache-Control"] = "private"
             self._req.headers_out["Expires"] = "-1"
         else:
             self._req.headers_out["Cache-Control"] = "no-store, no-cache, must-revalidate"
-
+            self._req.headers_out["Pragma"] = "no-cache"
 
     def _redirect( self, targetURL, noCache=False ):