joomla/joomla-cms — pull request #1378 by vdespa (2013-06-28 18:11:56+00:00)
Title: Fixed [#28832] List field replacement in preprocessForm method

Setting 2nd parm for DOMDocument::importNode to true.

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=28832

"If set to TRUE, this method will recursively import the subtree under the importedNode."
http://php.net/manual/en/domdocument.importnode.php