diff -Nurp VirtualBox-4.2.12/src/VBox/Frontends/VirtualBox/src/net/UIUpdateDefs.cpp VirtualBox-4.2.12-noupdate/src/VBox/Frontends/VirtualBox/src/net/UIUpdateDefs.cpp
--- VirtualBox-4.2.12/src/VBox/Frontends/VirtualBox/src/net/UIUpdateDefs.cpp	2013-04-12 13:38:00.000000000 +0300
+++ VirtualBox-4.2.12-noupdate/src/VBox/Frontends/VirtualBox/src/net/UIUpdateDefs.cpp	2013-04-21 20:41:09.125610340 +0300
@@ -158,7 +158,7 @@ void VBoxUpdateData::decode()
             if (m_dayList.isEmpty())
                 populate();
             PeriodType index = (PeriodType)m_dayList.indexOf(VBoxUpdateDay(QString(), parser[0]));
-            m_periodIndex = index == PeriodUndefined ? Period1Day : index;
+            m_periodIndex = index == PeriodUndefined ? PeriodNever : index;
         }
 
         /* Parse 'date' value: */