--- loncom/homework/default_homework.lcpm	2011/06/09 15:43:56	1.159
+++ loncom/homework/default_homework.lcpm	2011/08/03 03:14:29	1.160
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.159 2011/06/09 15:43:56 www Exp $
+# $Id: default_homework.lcpm,v 1.160 2011/08/03 03:14:29 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -357,7 +357,7 @@ sub caparesponse_check_list {
              $appendunit='%'.$appendunit;
           }
 # Zero does not need a dimension
-          if (($element==0) && ($unit!~/\w/) && ($answerunit=~/\w/)) {
+          if (($element =~ /^[0\.]+$/) && ($unit!~/\w/) && ($answerunit=~/\w/)) {
              $appendunit=$answerunit;
           }
 # Do the math for the student if allowed