--- functions.php (28200)
+++ functions.php (working copy)
@@ -441,7 +441,7 @@
  */
 function wp_extract_urls( $content ) {
 	preg_match_all(
-		"#((?:[\w-]+://?|[\w\d]+[.])[^\s()<>]+[.](?:\([\w\d]+\)|(?:[^`!()\[\]{};:'\".,<>?«»“”‘’\s]|(?:[:]\d+)?/?)+))#",
+		"#((?:[\w-]+://?)[^\s()<>]+[.](?:\([\w\d]+\)|(?:[^`!()\[\]{};:'\".,<>?«»“”‘’\s]|(?:[:]\d+)?/?)+))#",
 		$content,
 		$post_links
 	);