Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 12248)
+++ wp-includes/formatting.php	(working copy)
@@ -1331,7 +1331,7 @@
 function make_clickable($ret) {
 	$ret = ' ' . $ret;
 	// in testing, using arrays here was found to be faster
-	$ret = preg_replace_callback('#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/=?@\[\](+-]|[.,;:](?![\s<]|(\))?([\s]|$))|(?(1)\)(?![\s<]|$)|\)))+)#is', '_make_url_clickable_cb', $ret);
+	$ret = preg_replace_callback('#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/=?@\[\](+-]|[.,;:](?![\s<]|(\))?([\s]|$))|(?(1)\)(?![\s<.,;:]|$)|\)))+)#is', '_make_url_clickable_cb', $ret);
 	$ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret);
 	$ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret);
 	// this one is not in an array because we need it to run last, for cleanup of accidental links within links