--- loncom/lonenc.pm	2006/09/28 20:47:13	1.17
+++ loncom/lonenc.pm	2006/12/08 22:04:57	1.18
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # URL translation for encrypted filenames
 #
-# $Id: lonenc.pm,v 1.17 2006/09/28 20:47:13 albertel Exp $
+# $Id: lonenc.pm,v 1.18 2006/12/08 22:04:57 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -109,7 +109,12 @@ sub encrypted {
 
 sub check_encrypt {
     my $str=shift;
-    if ($env{'request.enc'}) { return &Apache::lonenc::encrypted($str); }
+    if (ref($str)) {
+        if ($env{'request.enc'}) { $$str = &Apache::lonenc::encrypted($$str); }
+        return;
+    } else {
+        if ($env{'request.enc'}) { return &Apache::lonenc::encrypted($str); }
+    }
     return $str;
 }