--- loncom/homework/structuretags.pm	2011/02/06 18:43:10	1.487
+++ loncom/homework/structuretags.pm	2011/06/06 17:43:51	1.488
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.487 2011/02/06 18:43:10 www Exp $
+# $Id: structuretags.pm,v 1.488 2011/06/06 17:43:51 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -411,7 +411,9 @@ sub setup_rndseed {
 	    delete($env{'form.resetdata'});
 	    delete($env{'form.newrandomization'});
 	}
-	if (defined($rndseed) && $rndseed ne int($rndseed)) {
+        $rndseed=~s/\,/\:/g;
+        $rndseed=~s/[^\w\d\:\-]//g;
+	if ((defined($rndseed)) && ($rndseed!~/^[\d\-]+\:[\d\-]+/)) {
 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
         }
         if ($Apache::lonhomework::history{'resource.CODE'}) {
@@ -642,7 +644,7 @@ $show_all
    <div class="LC_edit_problem_header_randomize_row">
      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
-     <input type="text" name="rndseed" size="10" value="'.
+     <input type="text" name="rndseed" size="24" value="'.
 	       $rndseed.'"
              onchange="javascript:document.lonhomework.changerandseed.click()" />';