diff -r 21239b3bcd78 -r 9711e452b5e9 calendarui/views/src/calentodoview.cpp
--- a/calendarui/views/src/calentodoview.cpp	Wed Apr 14 15:55:57 2010 +0300
+++ b/calendarui/views/src/calentodoview.cpp	Tue Apr 27 16:36:22 2010 +0300
@@ -424,6 +424,8 @@
             iServices.IssueCommandL( aCommand );
             }
             break;
+        case ECalenShowCalendars:            
+               ClearMarkedToDoItems();              
         default:
             SaveCurrentItemIndexL();
             CCalenNativeView::HandleCommandL( aCommand );
@@ -681,7 +683,7 @@
             // setup edit/mark menu
             case R_CALENDAR_DONE_UNDONE:
                 {
-                if( Container()->MarkedCount() == 1)
+                if( Container()->MarkedCount() )
                     {
                     TBool crossout( EFalse );
                     crossout = CheckMarkedItemCompletedL();