Index: wp-includes/query.php
===================================================================
--- wp-includes/query.php	(revision 19111)
+++ wp-includes/query.php	(working copy)
@@ -2181,7 +2181,7 @@
 			if ( !empty($q['sentence']) ) {
 				$q['search_terms'] = array($q['s']);
 			} else {
-				preg_match_all('/".*?("|$)|((?<=[\\s",+])|^)[^\\s",+]+/', $q['s'], $matches);
+				preg_match_all('/".*?("|$)|((?<=[\r\n\t ",+])|^)[^\r\n\t ",+]+/', $q['s'], $matches);
 				$q['search_terms'] = array_map('_search_terms_tidy', $matches[0]);
 			}
 			$n = !empty($q['exact']) ? '' : '%';