diff -Naur chart2.31m11/chart2/source/controller/dialogs/DialogModel.cxx chart2.fix/chart2/source/controller/dialogs/DialogModel.cxx
--- chart2.31m11/chart2/source/controller/dialogs/DialogModel.cxx	2008-10-01 16:35:04.000000000 +0800
+++ chart2.fix/chart2/source/controller/dialogs/DialogModel.cxx	2010-08-19 21:32:55.765625000 +0800
@@ -387,7 +387,9 @@
 }
 
 DialogModel::~DialogModel()
-{}
+{
+    m_xBackupChartDocument->dispose();  // memory leak
+}
 
 void DialogModel::setTemplate(
     const Reference< XChartTypeTemplate > & xTemplate )