--- loncom/interface/loncommon.pm	2005/11/15 16:04:14	1.291
+++ loncom/interface/loncommon.pm	2005/11/15 18:07:46	1.292
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.291 2005/11/15 16:04:14 albertel Exp $
+# $Id: loncommon.pm,v 1.292 2005/11/15 18:07:46 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -3350,6 +3350,7 @@ sub no_cache {
 
 sub content_type {
     my ($r,$type,$charset) = @_;
+    &no_cache($r);
     if ($env{'browser.mathml'} && $type eq 'text/html') { $type='text/xml'; }
     unless ($charset) {
 	$charset=&Apache::lonlocal::current_encoding;