Imported From: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/9422bba5da52cf4e#
When event "OnPreSaveSubItem", which can be used only as hook to save
sub-item data, when main item is being saved doesn't set main item event
status to erFAIL, when it fails to save data to indicate, that error should
be shown.
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