Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 18627)
+++ wp-includes/formatting.php	(working copy)
@@ -64,7 +64,7 @@
 	$no_texturize_tags_stack = array();
 	$no_texturize_shortcodes_stack = array();
 
-	$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
+	$textarr = preg_split('/(<[^<]*>|\[[^\[]*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
 
 	foreach ( $textarr as &$curl ) {
 		if ( empty( $curl ) )