--- a/httpd/cgi-bin/check	Mon Sep 23 13:34:19 2013 +0200
+++ b/httpd/cgi-bin/check	Thu Mar 20 15:49:34 2014 -0500
@@ -2388,6 +2388,10 @@
                 if (defined($err->{line}) &&
                     $File->{Content}->[$err->{line} - 1])
                 {
+                    if (index($err->{msg}, 'Forbidden code point ') != -1) {
+                        # Prevent display of invalid characters
+                        substr($File->{Content}->[$err->{line} - 1], $err->{char}-1, 1)='?';
+                    }
                     if (defined($err->{char}) && $err->{char} =~ /^[0-9]+$/) {
                         ($line, $col) =
                             &truncate_line(