--- a/tools/assistant/lib/qhelpindexwidget.cpp	Mon Jun 21 22:38:13 2010 +0100
+++ b/tools/assistant/lib/qhelpindexwidget.cpp	Thu Jul 22 16:41:55 2010 +0100
@@ -244,7 +244,8 @@
         disconnect(this, SLOT(insertIndices()));
     d->indexProvider->stopCollecting();
     d->indices.clear();
-    filter(QString());
+    if (!onShutDown)
+        filter(QString());
 }
 
 /*!