--- loncom/auth/loncacc.pm	2002/09/30 20:35:38	1.23
+++ loncom/auth/loncacc.pm	2002/12/10 20:37:21	1.24
@@ -2,7 +2,7 @@
 # Cookie Based Access Handler for Construction Area
 # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
 #
-# $Id: loncacc.pm,v 1.23 2002/09/30 20:35:38 albertel Exp $
+# $Id: loncacc.pm,v 1.24 2002/12/10 20:37:21 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -48,7 +48,8 @@ sub constructaccess {
     my ($url,$ownerdomain)=@_;
     my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)/);
     unless (($ownername) && ($ownerdomain)) { return ''; }
-
+    # We do not allow editing of previous versions of files.
+    if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
     if (($ownername eq $ENV{'user.name'}) &&
         ($ownerdomain eq $ENV{'user.domain'})) {
 	return ($ownername,$ownerdomain);