--- loncom/interface/loncoursedata.pm	2004/04/30 14:36:52	1.132
+++ loncom/interface/loncoursedata.pm	2004/05/13 13:55:35	1.133
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: loncoursedata.pm,v 1.132 2004/04/30 14:36:52 matthew Exp $
+# $Id: loncoursedata.pm,v 1.133 2004/05/13 13:55:35 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2030,12 +2030,14 @@ sub get_problem_statistics {
     }
     my ($solved) = &execute_SQL_request($dbh,$request);
     #
+    $Solved -= $solved;
+    #
     $num    = 0 if (! defined($num));
     $tries  = 0 if (! defined($tries));
     $max    = 0 if (! defined($max));
     $min    = 0 if (! defined($min));
     $STD    = 0 if (! defined($STD));
-    $Solved = 0 if (! defined($Solved));
+    $Solved = 0 if (! defined($Solved) || $Solved < 0);
     $solved = 0 if (! defined($solved));
     #
     # Compute the more complicated statistics