diff --git a/src/effects.js b/src/effects.js
index 87d0f4db7..96441948b 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -14,9 +14,9 @@ var elemdisplay = {},
 	];
 
 jQuery.fn.extend({
-	show: function( speed, callback ) {
+	show: function( speed, easing, callback ) {
 		if ( speed || speed === 0) {
-			return this.animate( genFx("show", 3), speed, callback);
+			return this.animate( genFx("show", 3), speed, easing, callback);
 
 		} else {
 			for ( var i = 0, l = this.length; i < l; i++ ) {
@@ -58,9 +58,9 @@ jQuery.fn.extend({
 		}
 	},
 
-	hide: function( speed, callback ) {
+	hide: function( speed, easing, callback ) {
 		if ( speed || speed === 0 ) {
-			return this.animate( genFx("hide", 3), speed, callback);
+			return this.animate( genFx("hide", 3), speed, easing, callback);
 
 		} else {
 			for ( var i = 0, l = this.length; i < l; i++ ) {
@@ -83,7 +83,7 @@ jQuery.fn.extend({
 	// Save the old toggle function
 	_toggle: jQuery.fn.toggle,
 
-	toggle: function( fn, fn2 ) {
+	toggle: function( fn, fn2, callback ) {
 		var bool = typeof fn === "boolean";
 
 		if ( jQuery.isFunction(fn) && jQuery.isFunction(fn2) ) {
@@ -96,15 +96,15 @@ jQuery.fn.extend({
 			});
 
 		} else {
-			this.animate(genFx("toggle", 3), fn, fn2);
+			this.animate(genFx("toggle", 3), fn, fn2, callback);
 		}
 
 		return this;
 	},
 
-	fadeTo: function( speed, to, callback ) {
+	fadeTo: function( speed, to, easing, callback ) {
 		return this.filter(":hidden").css("opacity", 0).show().end()
-					.animate({opacity: to}, speed, callback);
+					.animate({opacity: to}, speed, easing, callback);
 	},
 
 	animate: function( prop, speed, easing, callback ) {
@@ -241,8 +241,8 @@ jQuery.each({
 	fadeIn: { opacity: "show" },
 	fadeOut: { opacity: "hide" }
 }, function( name, props ) {
-	jQuery.fn[ name ] = function( speed, callback ) {
-		return this.animate( props, speed, callback );
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return this.animate( props, speed, easing, callback );
 	};
 });
 
diff --git a/test/index.html b/test/index.html
index be1f3632a..78060d464 100644
--- a/test/index.html
+++ b/test/index.html
@@ -245,6 +245,8 @@ Z</textarea>
 			
 			<div id="slidetogglein" class='chain test'>slideToggleIn<div>slideToggleIn</div></div>
 			<div id="slidetoggleout" class='chain test out'>slideToggleOut<div>slideToggleOut</div></div>
+
+			<div id="fadeto" class='chain test'>fadeTo<div>fadeTo</div></div>
 		</div>
 		
 		<div id="fx-tests"></div>
diff --git a/test/unit/effects.js b/test/unit/effects.js
index 5ac471157..f82c4b177 100644
--- a/test/unit/effects.js
+++ b/test/unit/effects.js
@@ -562,6 +562,9 @@ test("Chain hide show", function() {
 test("Chain show hide", function() {
 	jQuery('#hide div').saveState().show('fast').hide('fast',jQuery.checkState);
 });
+test("Chain show hide with easing and callback", function() {
+	jQuery('#hide div').saveState().show('fast').hide('fast','linear',jQuery.checkState);
+});
 
 test("Chain toggle in", function() {
 	jQuery('#togglein div').saveState().toggle('fast').toggle('fast',jQuery.checkState);
@@ -569,13 +572,18 @@ test("Chain toggle in", function() {
 test("Chain toggle out", function() {
 	jQuery('#toggleout div').saveState().toggle('fast').toggle('fast',jQuery.checkState);
 });
-
+test("Chain toggle out with easing and callback", function() {
+ jQuery('#toggleout div').saveState().toggle('fast').toggle('fast','linear',jQuery.checkState);
+});
 test("Chain slideDown slideUp", function() {
 	jQuery('#slidedown div').saveState().slideDown('fast').slideUp('fast',jQuery.checkState);
 });
 test("Chain slideUp slideDown", function() {
 	jQuery('#slideup div').saveState().slideUp('fast').slideDown('fast',jQuery.checkState);
 });
+test("Chain slideUp slideDown with easing and callback", function() {
+	jQuery('#slideup div').saveState().slideUp('fast').slideDown('fast','linear',jQuery.checkState);
+});
 
 test("Chain slideToggle in", function() {
 	jQuery('#slidetogglein div').saveState().slideToggle('fast').slideToggle('fast',jQuery.checkState);
@@ -584,6 +592,10 @@ test("Chain slideToggle out", function() {
 	jQuery('#slidetoggleout div').saveState().slideToggle('fast').slideToggle('fast',jQuery.checkState);
 });
 
+test("Chain fadeTo 0.5 1.0 with easing and callback)", function() {
+	jQuery('#fadeto div').saveState().fadeTo('fast',0.5).fadeTo('fast',1.0,'linear',jQuery.checkState);
+});
+
 jQuery.makeTest = function( text ){
 	var elem = jQuery("<div></div>")
 		.attr("id", "test" + jQuery.makeTest.id++)