diff -r cb86b71cae0a -r 4bdfb6b5c9b4 imagehandlingutilities/thumbnailmanager/tmcommon/src/tmactivitymanager.cpp
--- a/imagehandlingutilities/thumbnailmanager/tmcommon/src/tmactivitymanager.cpp	Fri Jun 11 13:58:45 2010 +0300
+++ b/imagehandlingutilities/thumbnailmanager/tmcommon/src/tmactivitymanager.cpp	Wed Jun 23 18:33:48 2010 +0300
@@ -53,12 +53,15 @@
     {
     TN_DEBUG1( "CTMActivityManager::~CTMActivityManager()");
     
+    iObserver = NULL;
+    Cancel();
+    
 #ifdef MONITOR_LIGHTS
     delete iLight;
     iLight = NULL;
 #endif
-    
-    Cancel();
+
+    iTimer.Cancel();
     iTimer.Close();
     }