From f10057bc481753d92ebfb8dfcef5197af5d76972 Mon Sep 17 00:00:00 2001
From: jeresig <jeresig@gmail.com>
Date: Fri, 24 Sep 2010 15:57:51 -0400
Subject: [PATCH] Make sure that a clone of the animate speed properties are
 used to avoid recursion problems. Fixes #3583.

---
 src/effects.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/effects.js b/src/effects.js
index f3163ebbf..56141bb29 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -248,7 +248,7 @@ jQuery.each({
 
 jQuery.extend({
 	speed: function( speed, easing, fn ) {
-		var opt = speed && typeof speed === "object" ? speed : {
+		var opt = speed && typeof speed === "object" ? jQuery.extend({}, speed) : {
 			complete: fn || !fn && easing ||
 				jQuery.isFunction( speed ) && speed,
 			duration: speed,