diff -r 38571fd2a704 -r 0f07cd1b5772 calendarui/editors/src/CalenEntryUpdater.cpp
--- a/calendarui/editors/src/CalenEntryUpdater.cpp	Fri Mar 12 15:42:35 2010 +0200
+++ b/calendarui/editors/src/CalenEntryUpdater.cpp	Mon Mar 15 12:40:18 2010 +0200
@@ -353,7 +353,9 @@
     TCalenInstanceId instanceIdTemp = iServices.Context().InstanceId();
     instanceIdTemp.iColId = colId;
     instanceIdTemp.iType = aEditedEntry.EntryTypeL();
-    if( aNewInstanceStartDate.TimeLocalL() != aOrigInstanceDate.TimeLocalL() )
+    
+    if (aNewInstanceStartDate.TimeLocalL() != aOrigInstanceDate.TimeLocalL()
+            || instanceIdTemp.iInstanceTime <= 0)
         {
         instanceIdTemp.iInstanceTime = aNewInstanceStartDate.TimeLocalL();
         }