Hi Iain,
The bug has been added to the bugtracker of the component to be corrected in the next version.
But if you want to correct it now, you can just edit the file /components/com_neorecruit/tasks/front.offer_search.php, and replace the line 40 :
$location = JRequest::getVar( 'location', $defaultLocation, '', 'word' );
by the following one :
$location = JRequest::getVar( 'location', $defaultLocation, '', 'string' );
Regards,