Index: wp-includes/taxonomy.php
===================================================================
--- wp-includes/taxonomy.php	(revision 19479)
+++ wp-includes/taxonomy.php	(working copy)
@@ -1339,6 +1339,9 @@
 		case 'names':
 			$selects = array('t.term_id', 'tt.parent', 'tt.count', 't.name');
 			break;
+		case 'slugs':
+			$selects = array('t.term_id', 'tt.parent', 'tt.count', 't.slug');
+			break;
 		case 'count':
 			$orderby = '';
 			$order = '';
@@ -1416,6 +1419,10 @@
 		while ( $term = array_shift($terms) )
 			$_terms[] = $term->name;
 		$terms = $_terms;
+	} elseif ( 'slugs' == $fields ) {
+		while ( $term = array_shift($terms) )
+			$_terms[] = $term->slug;
+		$terms = $_terms;
 	}
 
 	if ( 0 < $number && intval(@count($terms)) > $number ) {