Index: branches/RC/core/install/upgrades.sql
===================================================================
diff -u -N -r11685 -r11711
--- branches/RC/core/install/upgrades.sql	(.../upgrades.sql)	(revision 11685)
+++ branches/RC/core/install/upgrades.sql	(.../upgrades.sql)	(revision 11711)
@@ -1314,7 +1314,7 @@
 SET SimpleSearch = 0
 WHERE FieldType NOT IN ('text', 'range') AND SimpleSearch = 1;
 
-DELETE FROM PersistantSessionData WHERE VariableName IN ('c_columns_.', 'c.showall_columns_.');
+DELETE FROM PersistantSessionData WHERE VariableName IN ('c_columns_.', 'c.showall_columns_.', 'emailevents_columns_.', 'emailmessages_columns_.');
 
 DELETE FROM Modules WHERE Name = 'Proj-Base';
 UPDATE Modules SET Version = '5.0.0', Loaded = 1 WHERE Name = 'In-Portal';
\ No newline at end of file