--- loncom/xml/londefdef.pm	2008/03/10 08:54:13	1.383
+++ loncom/xml/londefdef.pm	2008/03/17 10:21:30	1.384
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.383 2008/03/10 08:54:13 foxr Exp $
+# $Id: londefdef.pm,v 1.384 2008/03/17 10:21:30 foxr Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -2101,6 +2101,10 @@ sub end_table {
 	my $WARNING='';
         #width of columns from TeXwidth attributes
 
+	# Protect against unbalanced </table> tag.
+
+	if (scalar(@Apache::londefdef::table) > 0) {
+
 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
@@ -2504,6 +2508,7 @@ sub end_table {
 	    undef @Apache::londefdef::table;
 	}
     }
+    }
     return $currentstring;
 }