In date.field.inc at line 229:
'granularity' => drupal_map_assoc(array('year', 'month', 'day', 'hour', 'minute'))
in my opinion there should be
'granularity' => drupal_map_assoc(array('year', 'month', 'day', 'hour', 'minute','second')),

and also in date_admin.inc in condition which is starting at 324 line
if (in_array($widget['type'], array('date_select', 'date_popup'))) ... there should be also seconds when using 'second' granularity.

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Issue summary:View changes

additional information

Version:7.x-2.6» 7.x-2.x-dev
Issue summary:View changes
Status:Needs review» Patch (to be ported)

You should upload patch in git diff format http://drupal.org/patch with Needs review status for review